{"id":85124,"date":"2025-03-27T16:58:18","date_gmt":"2025-03-27T09:58:18","guid":{"rendered":"https:\/\/itviecblog.uptech.vn\/?p=85124"},"modified":"2025-06-17T15:24:43","modified_gmt":"2025-06-17T08:24:43","slug":"format-html","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/format-html\/","title":{"rendered":"Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itviec.com\/blog\/format-html\/#Format_HTML_la_gi\" >Format HTML l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itviec.com\/blog\/format-html\/#Cac_dang_format_HTML\" >C\u00e1c d\u1ea1ng format HTML\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itviec.com\/blog\/format-html\/#Top_10_cac_the_format_HTML_pho_bien\" >Top 10+ c\u00e1c th\u1ebb format HTML ph\u1ed5 bi\u1ebfn<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itviec.com\/blog\/format-html\/#Vi_du_cach_dinh_dang_van_ban_trong_HTML\" >V\u00ed d\u1ee5 c\u00e1ch \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itviec.com\/blog\/format-html\/#Cau_hoi_thuong_gap_ve_Format_HTML\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Format HTML<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itviec.com\/blog\/format-html\/#Tong_ket_ve_Format_HTML\" >T\u1ed5ng k\u1ebft v\u1ec1 Format HTML<\/a><\/li><\/ul><\/nav><\/div>\n<p><em><strong>Format HTML, hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML, l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c th\u1ebb HTML c\u1ee5 th\u1ec3 \u0111\u1ec3 s\u1eeda \u0111\u1ed5i giao di\u1ec7n v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a v\u0103n b\u1ea3n tr\u00ean trang web. Format HTML cho ph\u00e9p b\u1ea1n \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau nh\u01b0 in \u0111\u1eadm, in nghi\u00eang, g\u1ea1ch ch\u00e2n, highlight ho\u1eb7c g\u1ea1ch ngang ch\u1eef.<\/strong><\/em><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ecdc b\u00e0i vi\u1ebft sau \u0111\u00e2y \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p chi ti\u1ebft h\u01a1n v\u1ec1:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ed5ng quan v\u1ec1 format HTML nh\u01b0 \u0111\u1ecbnh ngh\u0129a, c\u00e1ch s\u1eed d\u1ee5ng v\u00e0 c\u00e1c lo\u1ea1i \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ed5ng h\u1ee3p c\u00e1c th\u1ebb \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n HTML th\u01b0\u1eddng g\u1eb7p<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 v\u1ec1 c\u00e1ch \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Format_HTML_la_gi\"><\/span><b>Format HTML l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Format HTML l\u00e0 c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c th\u1ebb HTML \u0111\u1ec3 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n tr\u00ean trang web. C\u00e1c th\u1ebb n\u00e0y gi\u00fap thay \u0111\u1ed5i ki\u1ec3u ch\u1eef, c\u0103n ch\u1ec9nh n\u1ed9i dung, l\u00e0m n\u1ed5i b\u1eadt th\u00f4ng tin quan tr\u1ecdng v\u00e0 \u0111\u1ea3m b\u1ea3o v\u0103n b\u1ea3n hi\u1ec3n th\u1ecb \u0111\u00fang theo mong mu\u1ed1n. Vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1c th\u1ebb format HTML gi\u00fap n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a n\u1ed9i dung hi\u1ec3n th\u1ecb tr\u00ean tr\u00ecnh duy\u1ec7t.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt;&lt;strong&gt;Ch\u1eef in \u0111\u1eadm&lt;\/strong&gt; v\u00e0 &lt;em&gt;ch\u1eef in nghi\u00eang&lt;\/em&gt;.&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;p&gt;V\u0103n b\u1ea3n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c &lt;u&gt;g\u1ea1ch ch\u00e2n&lt;\/u&gt; ho\u1eb7c &lt;mark&gt;t\u00f4 s\u00e1ng&lt;\/mark&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">&lt;strong&gt; l\u00e0m \u0111\u1eadm ch\u1eef<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">&lt;em&gt; l\u00e0m nghi\u00eang ch\u1eef<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">&lt;u&gt; g\u1ea1ch ch\u00e2n ch\u1eef<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">&lt;mark&gt; t\u00f4 s\u00e1ng ch\u1eef<\/span><\/li>\n<\/ul>\n<blockquote><p><em>\u0110\u1ecdc th\u00eam: <a href=\"\/blog\/cac-the-trong-html\/\" target=\"_blank\" rel=\"noopener\"><strong>T\u1ed5ng h\u1ee3p 70+ c\u00e1c th\u1ebb trong HTML th\u00f4ng d\u1ee5ng<\/strong><\/a><\/em><\/p><\/blockquote>\n<h2><span class=\"ez-toc-section\" id=\"Cac_dang_format_HTML\"><\/span><b>C\u00e1c d\u1ea1ng format HTML\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Format HTML c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ch\u00ednh l\u00e0 th\u1ebb logic (logical tag) v\u00e0 th\u1ebb v\u1eadt l\u00fd (physical tag).<\/span><\/p>\n<h3><b>Th\u1ebb format HTML Logical tag (&lt;strong&gt;, &lt;em&gt;)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Logical tag truy\u1ec1n t\u1ea3i n\u1ed9i dung, \u00fd ngh\u0129a c\u1ee7a v\u0103n b\u1ea3n m\u00e0 kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i thay \u0111\u1ed5i giao di\u1ec7n tr\u1ef1c quan. C\u00e1c th\u1ebb n\u00e0y gi\u00fap tr\u00ecnh duy\u1ec7t, c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm v\u00e0 c\u00f4ng ngh\u1ec7 h\u1ed7 tr\u1ee3 hi\u1ec3u \u0111\u01b0\u1ee3c m\u1ee5c \u0111\u00edch c\u1ee7a v\u0103n b\u1ea3n.<\/span><\/p>\n<h4><b>&lt;em&gt;<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Nh\u1ea5n m\u1ea1nh n\u1ed9i dung quan tr\u1ecdng, th\u01b0\u1eddng \u0111\u01b0\u1ee3c in nghi\u00eang. Mang \u00fd ngh\u0129a r\u1eb1ng v\u0103n b\u1ea3n c\u00f3 \u00fd quan tr\u1ecdng c\u1ea7n \u0111\u01b0\u1ee3c ng\u01b0\u1eddi xem ch\u00fa \u00fd ho\u1eb7c c\u1ea7n \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;em&gt;Ch\u00fa \u00fd ph\u1ea7n n\u00e0y&lt;\/em&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u2192 Nh\u1ea5n m\u1ea1nh \u0111\u1ec3 ng\u01b0\u1eddi \u0111\u1ecdc t\u1eadp trung.<\/span><\/p>\n<h4><b>&lt;strong&gt;<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1nh d\u1ea5u v\u0103n b\u1ea3n quan tr\u1ecdng b\u1eb1ng c\u00e1ch in \u0111\u1eadm, mang \u00fd ngh\u0129a r\u1eb1ng n\u1ed9i dung quan tr\u1ecdng c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;strong&gt;C\u1ea3nh b\u00e1o!&lt;\/strong&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u2192 Thu h\u00fat s\u1ef1 ch\u00fa \u00fd \u0111\u1ebfn th\u00f4ng tin quan tr\u1ecdng.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Logical tag th\u01b0\u1eddng d\u00f9ng trong SEO \u0111\u1ec3 nh\u1ea5n m\u1ea1nh t\u1eeb kh\u00f3a ho\u1eb7c c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng \u0111\u1ecdc cho ng\u01b0\u1eddi d\u00f9ng khi\u1ebfm th\u1ecb qua screen reader.<\/span><\/p>\n<h3><b>Th\u1ebb format HTML Physical tag (&lt;b&gt;, &lt;i&gt;)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Trong khi \u0111\u00f3, physical tag \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u00e1ch v\u0103n b\u1ea3n hi\u1ec3n th\u1ecb tr\u00ean trang web b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i ph\u00f4ng ch\u1eef, k\u00edch th\u01b0\u1edbc ho\u1eb7c ki\u1ec3u ch\u1eef.<\/span><\/p>\n<h4><b>&lt;b&gt;<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">In \u0111\u1eadm n\u1ed9i dung v\u0103n b\u1ea3n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;b&gt;Ti\u00eau \u0111\u1ec1 ph\u1ee5&lt;\/b&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u2192 L\u00e0m \u0111\u1eadm m\u00e0 kh\u00f4ng nh\u1ea5n m\u1ea1nh \u00fd ngh\u0129a.<\/span><\/p>\n<h4><b>&lt;i&gt;<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">In nghi\u00eang n\u1ed9i dung v\u0103n b\u1ea3n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;i&gt;T\u00ean s\u00e1ch&lt;\/i&gt;<\/span><\/pre>\n<p><span style=\"font-weight: 400;\">\u2192 T\u1ea1o ki\u1ec3u nghi\u00eang cho \u0111\u1eb9p m\u1eaft.<\/span><\/p>\n<blockquote><p><i><span style=\"font-weight: 400;\">Xem th\u00eam: <\/span><\/i><a href=\"\/blog\/html-la-gi\/\" target=\"_blank\" rel=\"noopener\"><i><span style=\"font-weight: 400;\"><strong>Gi\u1ea3i \u0111\u00e1p \u201ct\u1ea5t t\u1ea7n t\u1eadt\u201d nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 HTML<\/strong><\/span><\/i><\/a><\/p><\/blockquote>\n<p><span style=\"font-weight: 400;\">Physical tag<\/span> <span style=\"font-weight: 400;\">ph\u00f9 h\u1ee3p cho thi\u1ebft k\u1ebf giao di\u1ec7n, l\u00e0m \u0111\u1eb9p v\u0103n b\u1ea3n m\u00e0 kh\u00f4ng c\u1ea7n quan t\u00e2m \u0111\u1ebfn ng\u1eef ngh\u0129a.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, khi s\u1eed d\u1ee5ng 2 th\u1ebb n\u00e0y b\u1ea1n c\u0169ng c\u1ea7n l\u01b0u \u00fd:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tr\u00e1nh l\u1ea1m d\u1ee5ng th\u1ebb physical tag khi ng\u1eef ngh\u0129a quan tr\u1ecdng, v\u00ec ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm \u0111\u00e1nh gi\u00e1 cao.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">K\u1ebft h\u1ee3p c\u1ea3 hai lo\u1ea1i th\u1ebb \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t v\u1ec1 c\u1ea3 giao di\u1ec7n v\u00e0 \u00fd ngh\u0129a.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Top_10_cac_the_format_HTML_pho_bien\"><\/span><b>Top 10+ c\u00e1c th\u1ebb format HTML ph\u1ed5 bi\u1ebfn<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">D\u01b0\u1edbi \u0111\u00e2y ITviec s\u1ebd li\u1ec7t k\u00ea c\u00e1c th\u1ebb \u0111\u1ecbnh d\u1ea1ng th\u01b0\u1eddng g\u1eb7p trong c\u00e1c phi\u00ean b\u1ea3n HTML m\u1edbi nh\u1ea5t.\u00a0<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Format HTML tags<\/b><\/td>\n<td><b>C\u00f4ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;b&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">In \u0111\u1eadm v\u0103n b\u1ea3n nh\u01b0ng kh\u00f4ng mang \u00fd ngh\u0129a quan tr\u1ecdng.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;strong&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">In \u0111\u1eadm v\u0103n b\u1ea3n v\u00e0 nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u1ed9i dung.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;i&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">In nghi\u00eang v\u0103n b\u1ea3n nh\u01b0ng kh\u00f4ng mang \u00fd ngh\u0129a \u0111\u1eb7c bi\u1ec7t.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;em&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">In nghi\u00eang v\u0103n b\u1ea3n v\u00e0 nh\u1ea5n m\u1ea1nh n\u1ed9i dung.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;u&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">G\u1ea1ch ch\u00e2n v\u0103n b\u1ea3n.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;mark&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">T\u00f4 m\u00e0u \u0111\u00e1nh d\u1ea5u v\u0103n b\u1ea3n.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;sup&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hi\u1ec3n th\u1ecb ch\u1ec9 s\u1ed1 tr\u00ean (superscript)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;sub&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hi\u1ec3n th\u1ecb ch\u1ec9 s\u1ed1 d\u01b0\u1edbi (subscript)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;del&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">G\u1ea1ch ngang v\u0103n b\u1ea3n \u0111\u1ec3 ch\u1ec9 n\u1ed9i dung b\u1ecb x\u00f3a.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;ins&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">G\u1ea1ch d\u01b0\u1edbi v\u0103n b\u1ea3n \u0111\u1ec3 ch\u1ec9 n\u1ed9i dung \u0111\u01b0\u1ee3c th\u00eam v\u00e0o.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;big&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n v\u1edbi k\u00edch th\u01b0\u1edbc <\/span><b>l\u1edbn h\u01a1n<\/b><span style=\"font-weight: 400;\"> b\u00ecnh th\u01b0\u1eddng.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;small&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n v\u1edbi k\u00edch th\u01b0\u1edbc <\/span><b>nh\u1ecf h\u01a1n<\/b><span style=\"font-weight: 400;\"> b\u00ecnh th\u01b0\u1eddng.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>Th\u1ebb &lt;b&gt; &#8211; In \u0111\u1eadm v\u0103n b\u1ea3n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;b&gt; (bold &#8211; in \u0111\u1eadm) l\u00e0 physical tag \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 in \u0111\u1eadm v\u0103n b\u1ea3n nh\u01b0ng kh\u00f4ng mang \u00fd ngh\u0129a nh\u1ea5n m\u1ea1nh n\u1ed9i dung.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; \u0110\u00e2y l\u00e0 n\u1ed9i dung &lt;b&gt;in \u0111\u1eadm&lt;\/b&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85156\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-1-vippro.jpg\" alt=\"format html - b - itviec blog\" width=\"277\" height=\"52\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-1-vippro.jpg 277w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-1-vippro-200x38.jpg 200w\" sizes=\"auto, (max-width: 277px) 100vw, 277px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;strong&gt; &#8211; In \u0111\u1eadm n\u1ed9i dung quan tr\u1ecdng<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">&lt;strong&gt; l\u00e0 semantic tag (th\u1ebb ng\u1eef ngh\u0129a) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb r\u1eb1ng v\u0103n b\u1ea3n b\u00ean trong th\u1ebb c\u00f3 n\u1ed9i dung quan tr\u1ecdng. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng c\u00e1ch l\u00e0m cho v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c in \u0111\u1eadm.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; \u0110\u00e2y l\u00e0 n\u1ed9i dung &lt;strong&gt;c\u1ea7n \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh&lt;\/strong&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85157\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-2-vippro.jpg\" alt=\"format html - strong - itviec blog\" width=\"535\" height=\"54\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-2-vippro.jpg 535w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-2-vippro-300x30.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-2-vippro-200x20.jpg 200w\" sizes=\"auto, (max-width: 535px) 100vw, 535px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;i&gt; &#8211; In nghi\u00eang v\u0103n b\u1ea3n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">&lt;i&gt; l\u00e0 physical tag \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m cho v\u0103n b\u1ea3n nghi\u00eang. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ec9 v\u0103n b\u1ea3n n\u01b0\u1edbc ngo\u00e0i, b\u00e0i vi\u1ebft nghi\u00ean c\u1ee9u khoa h\u1ecdc, suy ngh\u0129, tr\u00edch d\u1eabn,&#8230;<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; \u0110\u1ecbnh d\u1ea1ng ch\u1eef &lt;i&gt;in nghi\u00eang&lt;\/i&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85158\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-3-vippro.jpg\" alt=\"format html - i - itviec blog\" width=\"300\" height=\"49\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-3-vippro.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-3-vippro-200x33.jpg 200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;em&gt; &#8211; Nh\u1ea5n m\u1ea1nh n\u1ed9i dung quan tr\u1ecdng<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb HTML &lt;em&gt; l\u00e0 th\u1ebb ng\u1eef ngh\u0129a (semantic tag) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb r\u1eb1ng v\u0103n b\u1ea3n b\u00ean trong th\u1ebb \u0111ang \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh. \u0110\u00e2y l\u00e0 th\u1ebb ng\u1eef ngh\u0129a tr\u00e1i ng\u01b0\u1ee3c v\u1edbi &lt;i&gt;, kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 \u00fd ngh\u0129a ng\u1eef ngh\u0129a n\u00e0o.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; N\u1ed9i dung n\u00e0y &lt;em&gt;c\u1ea7n \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh (emphasized)&lt;\/em&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85159\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-4-vippro.jpg\" alt=\"format html - em - itviec blog\" width=\"504\" height=\"48\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-4-vippro.jpg 504w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-4-vippro-300x29.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-4-vippro-200x19.jpg 200w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;u&gt; &#8211; G\u1ea1ch ch\u00e2n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;u&gt; l\u00e0 physical tag \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u1ea1ch ch\u00e2n v\u0103n b\u1ea3n.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt;\u0110\u1ecbnh d\u1ea1ng &lt;u&gt;g\u1ea1ch ch\u00e2n v\u0103n b\u1ea3n&lt;\/u&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85167\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-12-vippro.jpg\" alt=\"format html - u - itviec blog\" width=\"316\" height=\"51\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-12-vippro.jpg 316w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-12-vippro-300x48.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-12-vippro-200x32.jpg 200w\" sizes=\"auto, (max-width: 316px) 100vw, 316px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;mark&gt; &#8211; \u0110\u00e1nh d\u1ea5u v\u0103n b\u1ea3n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;mark&gt; l\u00e0 physical tag \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 highlight, \u0111\u00e1nh d\u1ea5u v\u0103n b\u1ea3n n\u1ed5i b\u1eadt.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; N\u1ed9i dung n\u00e0y &lt;mark&gt;quan tr\u1ecdng&lt;\/mark&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85166\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-11-vippro.jpg\" alt=\"format html - mark - itviec blog\" width=\"274\" height=\"45\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-11-vippro.jpg 274w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-11-vippro-200x33.jpg 200w\" sizes=\"auto, (max-width: 274px) 100vw, 274px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;sup&gt; &#8211; Ch\u1ec9 s\u1ed1 tr\u00ean<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;sup&gt; \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o v\u0103n b\u1ea3n ch\u1ec9 s\u1ed1 tr\u00ean. V\u0103n b\u1ea3n \u0111\u01b0\u1ee3c \u0111\u1eb7t cao h\u01a1n n\u1eeda k\u00fd t\u1ef1 so v\u1edbi v\u0103n b\u1ea3n kh\u00e1c v\u00e0 c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n, v\u00ed d\u1ee5 k\u00fd hi\u1ec7u s\u1ed1 m\u0169 trong to\u00e1n h\u1ecdc.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; C\u00f4ng th\u1ee9c t\u00ednh l\u0169y th\u1eeba l\u00e0 a &lt;sup&gt;n&lt;\/sup&gt; =a.a.a.a.a..&lt;p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85160\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-5-vippro.jpg\" alt=\"format html - sup - itviec blog\" width=\"457\" height=\"63\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-5-vippro.jpg 457w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-5-vippro-300x41.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-5-vippro-200x28.jpg 200w\" sizes=\"auto, (max-width: 457px) 100vw, 457px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;sub&gt; &#8211; Ch\u1ec9 s\u1ed1 d\u01b0\u1edbi<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;sub&gt; \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o v\u0103n b\u1ea3n ch\u1ec9 s\u1ed1 d\u01b0\u1edbi. V\u0103n b\u1ea3n \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u1ea5p h\u01a1n n\u1eeda k\u00fd t\u1ef1 so v\u1edbi v\u0103n b\u1ea3n kh\u00e1c v\u00e0 c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n, v\u00ed d\u1ee5 nh\u01b0 c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt;C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a n\u01b0\u1edbc l\u00e0 H&lt;sub&gt;2&lt;\/sub&gt;O&lt;p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85161\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-6-vippro.jpg\" alt=\"format html - sub - itviec blog\" width=\"399\" height=\"58\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-6-vippro.jpg 399w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-6-vippro-300x44.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-6-vippro-200x29.jpg 200w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;del&gt; &#8211; G\u1ea1ch ngang v\u0103n b\u1ea3n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;del&gt; l\u00e0 th\u1ebb ng\u1eef ngh\u0129a (semantic tag) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb v\u0103n b\u1ea3n b\u1ecb x\u00f3a ho\u1eb7c thay \u0111\u1ed5i.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; \u0110\u00e2y l\u00e0 n\u1ed9i dung &lt;del&gt;b\u1ecb x\u00f3a&lt;\/del&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85162\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-7-vippro.jpg\" alt=\"format html - del - itviec blog\" width=\"255\" height=\"61\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-7-vippro.jpg 255w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-7-vippro-200x48.jpg 200w\" sizes=\"auto, (max-width: 255px) 100vw, 255px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;ins&gt; &#8211; N\u1ed9i dung \u0111\u01b0\u1ee3c th\u00eam v\u00e0o<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;ins&gt; l\u00e0 th\u1ebb ng\u1eef ngh\u0129a (semantic tag) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb v\u0103n b\u1ea3n \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00e8n v\u00e0o t\u00e0i li\u1ec7u. Th\u1ebb &lt;ins&gt; th\u01b0\u1eddng theo sau m\u1ed9t s\u1ed1 v\u0103n b\u1ea3n \u0111\u00e3 x\u00f3a.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt; \u0110\u00e2y l\u00e0 n\u1ed9i dung &lt;del&gt;b\u1ecb x\u00f3a&lt;\/del&gt; &lt;ins&gt;\u0111\u01b0\u1ee3c th\u00eam v\u00e0o&lt;\/ins&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85163\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-8-vippro.jpg\" alt=\"format html - ins - itviec blog\" width=\"399\" height=\"52\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-8-vippro.jpg 399w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-8-vippro-300x39.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-8-vippro-200x26.jpg 200w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;big&gt; &#8211; K\u00edch th\u01b0\u1edbc ch\u1eef l\u1edbn h\u01a1n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;big&gt; l\u00e0 physical tag \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m cho v\u0103n b\u1ea3n c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f4ng ch\u1eef l\u1edbn h\u01a1n m\u1ed9t c\u1ee1 ch\u1eef so v\u1edbi v\u0103n b\u1ea3n xung quanh.\u00a0<\/span><\/p>\n<blockquote><p><b><i>L\u01b0u \u00fd:<\/i><\/b><i><span style=\"font-weight: 400;\"> Th\u1ebb &lt;big&gt; kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 trong HTML5, n\u00ean d\u00f9ng CSS (font-size) thay th\u1ebf.<\/span><\/i><\/p><\/blockquote>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt;V\u0103n b\u1ea3n n\u00e0y c\u00f3 k\u00edch th\u01b0\u1edbc &lt;big&gt;l\u1edbn h\u01a1n&lt;\/big&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85164\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-9-vippro.jpg\" alt=\"format html - big - itviec blog\" width=\"372\" height=\"55\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-9-vippro.jpg 372w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-9-vippro-300x44.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-9-vippro-200x30.jpg 200w\" sizes=\"auto, (max-width: 372px) 100vw, 372px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>Th\u1ebb &lt;small&gt; &#8211; K\u00edch th\u01b0\u1edbc ch\u1eef nh\u1ecf h\u01a1n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Th\u1ebb &lt;small&gt; l\u00e0 physical tag \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m cho v\u0103n b\u1ea3n c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f4ng ch\u1eef nh\u1ecf h\u01a1n m\u1ed9t c\u1ee1 ch\u1eef so v\u1edbi v\u0103n b\u1ea3n xung quanh.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p&gt;V\u0103n b\u1ea3n n\u00e0y c\u00f3 k\u00edch th\u01b0\u1edbc &lt;small&gt;nh\u1ecf h\u01a1n&lt;\/small&gt;.&lt;\/p&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85165\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-10-vippro.jpg\" alt=\"format html - small - itviec blog\" width=\"361\" height=\"58\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-10-vippro.jpg 361w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-10-vippro-300x48.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-10-vippro-200x32.jpg 200w\" sizes=\"auto, (max-width: 361px) 100vw, 361px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vi_du_cach_dinh_dang_van_ban_trong_HTML\"><\/span><b>V\u00ed d\u1ee5 c\u00e1ch \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>V\u00ed d\u1ee5 1: \u0110\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n th\u00f4ng th\u01b0\u1eddng<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Trong v\u00ed d\u1ee5 n\u00e0y, tr\u00ecnh b\u00e0y nhi\u1ec1u th\u1ebb \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n kh\u00e1c nhau nh\u01b0 &lt;strong&gt; d\u00e0nh cho v\u0103n b\u1ea3n quan tr\u1ecdng v\u00e0 in \u0111\u1eadm, &lt;em&gt; d\u00e0nh cho v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh v\u00e0 in nghi\u00eang, &lt;b&gt; \u0111\u1ecbnh d\u1ea1ng ch\u1eef in \u0111\u1eadm, &lt;i&gt; \u0111\u1ecbnh d\u1ea1ng ch\u1eef in nghi\u00eang v\u00e0 &lt;mark&gt; d\u00e0nh cho v\u0103n b\u1ea3n b\u1ea1n mu\u1ed1n highlight.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!DOCTYPE html&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;html lang=\"en\"&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;head&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;meta charset=\"UTF-8\"&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;title&gt;V\u00ed d\u1ee5 v\u1ec1 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n, Format HTML&lt;\/title&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/head&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;body&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;strong&gt;Strong:&lt;\/strong&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0N\u1ed9i dung n\u00e0y \u0111\u01b0\u1ee3c in \u0111\u1eadm.<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;\/p&gt;\n<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;em&gt;Emphasized:&lt;\/em&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0N\u1ed9i dung n\u00e0y \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh v\u00e0 in nghi\u00eang<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;\/p&gt;\n<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;b&gt;Bold:&lt;\/b&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u0110\u1ecbnh d\u1ea1ng ch\u1eef in \u0111\u1eadm<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;i&gt;Italic:&lt;\/i&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u0110\u1ecbnh d\u1ea1ng ch\u1eef in nghi\u00eang<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;mark&gt;Marked:&lt;\/mark&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u0110\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n highlighted<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;\/p&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/body&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;\/html&gt;<\/span><\/pre>\n<p>K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean:<i><\/i><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85168\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-13-vippro.jpg\" alt=\"format html - itviec blog\" width=\"841\" height=\"256\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-13-vippro.jpg 841w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-13-vippro-300x91.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-13-vippro-768x234.jpg 640w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-13-vippro-200x61.jpg 200w\" sizes=\"auto, (max-width: 841px) 100vw, 841px\" \/><\/p>\n<h3><b>V\u00ed d\u1ee5 2: K\u1ebft h\u1ee3p Physical tag v\u00e0 Logical tag<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 n\u00e0y, th\u1ec3 hi\u1ec7n c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c th\u1ebb logical (mang \u00fd ngh\u0129a ng\u1eef ngh\u0129a) v\u00e0 physical (thay \u0111\u1ed5i giao di\u1ec7n) \u0111\u1ec3 t\u1ea1o ra \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n n\u00e2ng cao h\u01a1n. C\u00e1c th\u1ebb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>&lt;strong&gt; v\u00e0 &lt;em&gt;: <\/b><span style=\"font-weight: 400;\">K\u1ebft h\u1ee3p in \u0111\u1eadm v\u00e0 in nghi\u00eang \u0111\u1ec3 nh\u1ea5n m\u1ea1nh t\u1ed1i \u0111a.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>&lt;sub&gt; v\u00e0 &lt;sup&gt;:<\/b><span style=\"font-weight: 400;\"> \u0110\u1ecbnh d\u1ea1ng ch\u1ec9 s\u1ed1 d\u01b0\u1edbi v\u00e0 ch\u1ec9 s\u1ed1 tr\u00ean.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>&lt;del&gt; v\u00e0 &lt;ins&gt;: <\/b><span style=\"font-weight: 400;\">\u0110\u00e1nh d\u1ea5u v\u0103n b\u1ea3n b\u1ecb x\u00f3a v\u00e0 \u0111\u01b0\u1ee3c ch\u00e8n th\u00eam.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>&lt;small&gt;:<\/b><span style=\"font-weight: 400;\"> Gi\u1ea3m k\u00edch th\u01b0\u1edbc ch\u1eef cho ch\u00fa th\u00edch.<\/span><\/li>\n<\/ul>\n<pre><span style=\"font-weight: 400;\">&lt;!DOCTYPE html&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;html lang=\"en\"&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;head&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;meta charset=\"UTF-8\"&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;title&gt;\u0110\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n n\u00e2ng cao&lt;\/title&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/head&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;body&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;\u0110\u00e2y l\u00e0 n\u1ed9i dung\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;strong&gt;&lt;em&gt;r\u1ea5t quan tr\u1ecdng&lt;\/em&gt;&lt;\/strong&gt; c\u1ea7n \u0111\u01b0\u1ee3c in \u0111\u1eadm.<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a n\u01b0\u1edbc l\u00e0 H<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;sub&gt;2&lt;\/sub&gt;O.<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;\/p&gt;\n<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;del&gt;V\u0103n b\u1ea3n \u0111\u00e3 x\u00f3a&lt;\/del&gt; v\u00e0\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;ins&gt;v\u0103n b\u1ea3n m\u1edbi \u0111\u01b0\u1ee3c ch\u00e8n&lt;\/ins&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0s\u1ebd hi\u1ec3n th\u1ecb \u1edf \u0111\u00e2y.<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;&lt;small&gt;V\u0103n b\u1ea3n nh\u1ecf h\u01a1n&lt;\/small&gt;\u00a0<\/span>\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c tuy\u00ean b\u1ed1 t\u1eeb ch\u1ed1i tr\u00e1ch nhi\u1ec7m.<\/span>\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0&lt;\/p&gt;<\/span>\n\n<span style=\"font-weight: 400;\"> \u00a0\u00a0\u00a0&lt;p&gt;E = mc&lt;sup&gt;2&lt;\/sup&gt;&lt;\/p&gt;<\/span>\n<span style=\"font-weight: 400;\">&lt;\/body&gt;<\/span>\n\n<span style=\"font-weight: 400;\">&lt;\/html&gt;<\/span><\/pre>\n<p>K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean:<i><\/i><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85169\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-14-vippro.jpg\" alt=\"format html - itviec blog\" width=\"789\" height=\"268\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-14-vippro.jpg 789w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-14-vippro-300x102.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-14-vippro-768x261.jpg 640w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-14-vippro-200x68.jpg 200w\" sizes=\"auto, (max-width: 789px) 100vw, 789px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap_ve_Format_HTML\"><\/span><b>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Format HTML<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 thay \u0111\u1ed5i m\u00e0u ch\u1eef trong HTML?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 thay \u0111\u1ed5i m\u00e0u ch\u1eef, b\u1ea1n s\u1eed d\u1ee5ng thu\u1ed9c t\u00ednh style v\u00e0 thu\u1ed9c t\u00ednh color. B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam v\u1ec1 c\u00e1c m\u00e0u s\u1eafc c\u0169ng nh\u01b0 <\/span><a href=\"\/blog\/bang-mau-html\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">b\u1ea3ng m\u00e0u HTML<\/span><\/a><span style=\"font-weight: 400;\"> th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u1ed5i m\u00e0u ch\u1eef, khung v\u0103n b\u1ea3n hay highlight v\u0103n b\u1ea3n t\u1ed1t h\u01a1n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;span style=\"color: purple;\"&gt;V\u0103n b\u1ea3n n\u00e0y c\u00f3 m\u00e0u t\u00edm.&lt;\/span&gt;<\/span><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85170\" src=\"\/blog\/wp-content\/uploads\/2025\/03\/format-html-15-vippro.jpg\" alt=\"format html - itviec blog\" width=\"304\" height=\"52\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-15-vippro.jpg 304w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-15-vippro-300x51.jpg 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-15-vippro-200x34.jpg 200w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb c\u1ee7a \u0111o\u1ea1n m\u00e3 tr\u00ean.<\/span><\/i><\/p>\n<h3><b>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa &lt;b&gt; v\u00e0 &lt;strong&gt; l\u00e0 g\u00ec?<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">&lt;b&gt; ch\u1ec9 l\u00e0m ch\u1eef \u0111\u1eadm m\u00e0 kh\u00f4ng mang \u00fd ngh\u0129a \u0111\u1eb7c bi\u1ec7t v\u1ec1 n\u1ed9i dung.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">&lt;strong&gt; c\u0169ng l\u00e0m ch\u1eef \u0111\u1eadm nh\u01b0ng nh\u1ea5n m\u1ea1nh n\u1ed9i dung, c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn SEO.<\/span><\/li>\n<\/ul>\n<h3><b>C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng CSS thay th\u1ebf \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML kh\u00f4ng?<\/b><\/h3>\n<p><a href=\"\/blog\/css-la-gi\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">CSS<\/span><\/a><span style=\"font-weight: 400;\"> gi\u00fap t\u00f9y ch\u1ec9nh giao di\u1ec7n n\u00e2ng cao h\u01a1n, nh\u01b0ng HTML v\u1eabn c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a v\u0103n b\u1ea3n. T\u1ed1t nh\u1ea5t n\u00ean k\u1ebft h\u1ee3p c\u1ea3 hai \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1i \u01b0u.<\/span><\/p>\n<h3><b>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 c\u0103n gi\u1eefa v\u0103n b\u1ea3n trong HTML?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Hi\u1ec7n t\u1ea1i, vi\u1ec7c s\u1eed d\u1ee5ng th\u1ebb &lt;center&gt; \u0111\u1ec3 c\u0103n gi\u1eefa v\u0103n b\u1ea3n kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong phi\u00ean b\u1ea3n HTML m\u1edbi nh\u1ea5t. Do \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng CSS nh\u01b0 sau:<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;p style=\"text-align: center;\"&gt;V\u0103n b\u1ea3n c\u0103n gi\u1eefa&lt;\/p&gt;<\/span><\/pre>\n<blockquote><p><i><span style=\"font-weight: 400;\">Xem th\u00eam: <\/span><\/i><strong><a href=\"\/blog\/huong-dan-can-giua-css\/\" target=\"_blank\" rel=\"noopener\"><i>H\u01b0\u1edbng d\u1eabn c\u0103n gi\u1eefa CSS chi ti\u1ebft theo chi\u1ec1u ngang, d\u1ecdc, hai chi\u1ec1u<\/i><\/a><\/strong><\/p><\/blockquote>\n<h2><span class=\"ez-toc-section\" id=\"Tong_ket_ve_Format_HTML\"><\/span><b>T\u1ed5ng k\u1ebft v\u1ec1 Format HTML<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Format HTML gi\u00fap b\u1ea1n \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n d\u1ec5 \u0111\u1ecdc h\u01a1n khi n\u1ed9i dung \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb tr\u00ean trang web. T\u1eeb in \u0111\u1eadm, in nghi\u00eang, g\u1ea1ch ch\u00e2n \u0111\u1ebfn c\u0103n ch\u1ec9nh n\u1ed9i dung, c\u00e1c th\u1ebb HTML cung c\u1ea5p nhi\u1ec1u t\u00f9y ch\u1ecdn \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. Hy v\u1ecdng qua b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n \u0111\u00e3 n\u1eafm r\u00f5 c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c th\u1ebb \u0111\u1ecbnh d\u1ea1ng HTML \u0111\u1ec3 tr\u00ecnh b\u00e0y v\u00e0 t\u1ed1i \u01b0u n\u1ed9i dung m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u00e9!<\/span><\/p>\n<blockquote><p><i><span style=\"font-weight: 400;\">Xem th\u00eam: <\/span><\/i><strong><a href=\"\/blog\/cac-the-trong-html\/\" target=\"_blank\" rel=\"noopener\"><i>T\u1ed5ng h\u1ee3p 70+ c\u00e1c th\u1ebb trong HTML th\u00f4ng d\u1ee5ng<\/i><\/a><\/strong><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Format HTML, hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML, l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c th\u1ebb HTML c\u1ee5 th\u1ec3 \u0111\u1ec3 s\u1eeda \u0111\u1ed5i giao di\u1ec7n v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a v\u0103n b\u1ea3n tr\u00ean trang web. Format HTML cho ph\u00e9p b\u1ea1n \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau nh\u01b0 in \u0111\u1eadm, in nghi\u00eang, g\u1ea1ch [&hellip;]<\/p>\n","protected":false},"author":207,"featured_media":85359,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[109],"tags":[],"class_list":["post-85124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chuyen-mon-it"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn - ITviec Blog<\/title>\n<meta name=\"description\" content=\"Format HTML gi\u00fap n\u1ed9i dung r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 \u0111\u1ecdc h\u01a1n. \u0110\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n hi\u1ec7u qu\u1ea3 v\u1edbi 10+ tag format ph\u1ed5 bi\u1ebfn t\u1eeb in \u0111\u1eadm, in nghi\u00eang \u0111\u1ebfn c\u0103n ch\u1ec9nh.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itviec.com\/blog\/format-html\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn\" \/>\n<meta property=\"og:description\" content=\"Format HTML, hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML, l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c th\u1ebb HTML c\u1ee5 th\u1ec3 \u0111\u1ec3 s\u1eeda \u0111\u1ed5i giao di\u1ec7n v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a v\u0103n b\u1ea3n tr\u00ean trang web.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/itviec.com\/blog\/format-html\/\" \/>\n<meta property=\"og:site_name\" content=\"ITviec Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/ITviec\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-27T09:58:18+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-17T08:24:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-vippro-scaled.png\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"337\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Uyen Ngo\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@ITviec\" \/>\n<meta name=\"twitter:site\" content=\"@ITviec\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Uyen Ngo\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 ph\u00fat\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn - ITviec Blog","description":"Format HTML gi\u00fap n\u1ed9i dung r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 \u0111\u1ecdc h\u01a1n. \u0110\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n hi\u1ec7u qu\u1ea3 v\u1edbi 10+ tag format ph\u1ed5 bi\u1ebfn t\u1eeb in \u0111\u1eadm, in nghi\u00eang \u0111\u1ebfn c\u0103n ch\u1ec9nh.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/itviec.com\/blog\/format-html\/","og_locale":"vi_VN","og_type":"article","og_title":"Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn","og_description":"Format HTML, hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n trong HTML, l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c th\u1ebb HTML c\u1ee5 th\u1ec3 \u0111\u1ec3 s\u1eeda \u0111\u1ed5i giao di\u1ec7n v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a v\u0103n b\u1ea3n tr\u00ean trang web.","og_url":"https:\/\/itviec.com\/blog\/format-html\/","og_site_name":"ITviec Blog","article_publisher":"https:\/\/www.facebook.com\/ITviec","article_published_time":"2025-03-27T09:58:18+00:00","article_modified_time":"2025-06-17T08:24:43+00:00","og_image":[{"width":640,"height":337,"url":"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-vippro-scaled.png","type":"image\/png"}],"author":"Uyen Ngo","twitter_card":"summary_large_image","twitter_creator":"@ITviec","twitter_site":"@ITviec","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Uyen Ngo","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"13 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/itviec.com\/blog\/format-html\/#article","isPartOf":{"@id":"https:\/\/itviec.com\/blog\/format-html\/"},"author":{"name":"Uyen Ngo","@id":"https:\/\/itviec.com\/blog\/#\/schema\/person\/f4cd1226846e0258c664e170d3e52d20"},"headline":"Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn","datePublished":"2025-03-27T09:58:18+00:00","dateModified":"2025-06-17T08:24:43+00:00","mainEntityOfPage":{"@id":"https:\/\/itviec.com\/blog\/format-html\/"},"wordCount":2734,"publisher":{"@id":"https:\/\/itviec.com\/blog\/#organization"},"image":{"@id":"https:\/\/itviec.com\/blog\/format-html\/#primaryimage"},"thumbnailUrl":"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2025\/03\/format-html-vippro-scaled.png","articleSection":["Chuy\u00ean m\u00f4n IT"],"inLanguage":"vi"},{"@type":"WebPage","@id":"https:\/\/itviec.com\/blog\/format-html\/","url":"https:\/\/itviec.com\/blog\/format-html\/","name":"Top 10+ c\u00e1c th\u1ebb format HTML \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n ph\u1ed5 bi\u1ebfn - 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