{"id":69987,"date":"2024-06-03T17:30:53","date_gmt":"2024-06-03T10:30:53","guid":{"rendered":"https:\/\/itviec.com\/blog\/?p=69987"},"modified":"2024-06-04T18:33:40","modified_gmt":"2024-06-04T11:33:40","slug":"ki-tu-dac-biet-html","status":"publish","type":"post","link":"https:\/\/itviec.com\/blog\/ki-tu-dac-biet-html\/","title":{"rendered":"T\u1ed5ng h\u1ee3p 70+ k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t"},"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\/ki-tu-dac-biet-html\/#Ki_tu_dac_biet_HTML_la_gi\" >K\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t 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\/ki-tu-dac-biet-html\/#Cach_chen_cac_ki_tu_dac_biet_HTML\" >C\u00e1ch ch\u00e8n c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML<\/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\/ki-tu-dac-biet-html\/#Tong_hop_%E2%80%9Ctat_tan_tat%E2%80%9D_cac_ki_tu_dac_biet_HTML_pho_bien\" >T\u1ed5ng h\u1ee3p \u201ct\u1ea5t t\u1ea7n t\u1eadt\u201d c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML ph\u1ed5 bi\u1ebfn\u00a0<\/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\/ki-tu-dac-biet-html\/#Cac_cau_hoi_thuong_gap_ve_ki_tu_dac_biet_HTML\" >C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t 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\/ki-tu-dac-biet-html\/#Tong_ket_ve_ki_tu_dac_biet_HTML\" >T\u1ed5ng k\u1ebft v\u1ec1 k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<p><em><strong>\u0110\u00f4i khi b\u1ea1n mu\u1ed1n g\u00f5 c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML nh\u01b0ng ch\u00fang l\u1ea1i kh\u00f4ng ph\u1ed5 bi\u1ebfn v\u00e0 kh\u00f4ng th\u1ec3 g\u00f5 b\u1eb1ng b\u00e0n ph\u00edm th\u00f4ng th\u01b0\u1eddng nh\u01b0 k\u00fd hi\u1ec7u to\u00e1n h\u1ecdc, b\u1ea3n quy\u1ec1n hay ti\u1ec1n t\u1ec7,&#8230; B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ebfn c\u00e1c th\u1ef1c th\u1ec3 HTML (HTML Entities) \u0111\u1ec3 ch\u00e8n ch\u00fang v\u00e0o trang web m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng h\u01a1n. V\u1eady ch\u00e8n c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML nh\u01b0 th\u1ebf n\u00e0o?<\/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 v\u1ec1:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">K\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML l\u00e0 g\u00ec c\u0169ng nh\u01b0 c\u00e1ch ch\u00e8n th\u00f4ng d\u1ee5ng<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ed5ng h\u1ee3p b\u1ea3ng ph\u1ee5 l\u1ee5c v\u1ec1 c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong HTML<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Ki_tu_dac_biet_HTML_la_gi\"><\/span><b> K\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">K\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t l\u00e0 HTML l\u00e0 c\u00e1c k\u00ed t\u1ef1 n\u1eb1m ngo\u00e0i b\u1ea3ng ch\u1eef c\u00e1i Latinh v\u00e0 b\u1ea1n kh\u00f4ng th\u1ec3 g\u00f5 ch\u00fang b\u1eb1ng b\u00e0n ph\u00edm th\u00f4ng th\u01b0\u1eddng. Ch\u00fang c\u00f3 \u00fd ngh\u0129a \u0111\u1eb7c bi\u1ec7t trong HTML v\u00e0 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb d\u01b0\u1edbi d\u1ea1ng m\u1ed9t k\u00fd hi\u1ec7u c\u1ee5 th\u1ec3, nh\u01b0 m\u0169i t\u00ean ho\u1eb7c d\u1ea5u tr\u1ecdng \u00e2m tr\u00ean m\u1ed9t ch\u1eef c\u00e1i.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">M\u1ed7i k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t Entity (th\u1ef1c th\u1ec3) v\u00e0 m\u1ed7i th\u1ef1c th\u1ec3 \u0111\u1ec1u bao g\u1ed3m t\u00ean v\u00e0 s\u1ed1 \u0111\u1ea1i di\u1ec7n cho th\u1ef1c th\u1ec3 \u0111\u00f3.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach_chen_cac_ki_tu_dac_biet_HTML\"><\/span><b> C\u00e1ch ch\u00e8n c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Khi ch\u00e8n c\u00e1c k\u00fd hi\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng HTML Entity l\u00e0 c\u00e1c chu\u1ed7i k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t b\u1eaft \u0111\u1ea7u b\u1eb1ng d\u1ea5u <strong>&amp;<\/strong> v\u00e0 k\u1ebft th\u00fac b\u1eb1ng d\u1ea5u ch\u1ea5m ph\u1ea9y <strong>;<\/strong><\/span><\/p>\n<p><span style=\"font-weight: 400;\">C\u00e1c th\u1ef1c th\u1ec3 n\u00e0y \u0111\u1ea1i di\u1ec7n cho k\u00fd hi\u1ec7u c\u1ee5 th\u1ec3 v\u00e0 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng t\u00ean ho\u1eb7c s\u1ed1 c\u1ee7a th\u1ef1c th\u1ec3 \u0111\u00f3. C\u00e1c s\u1ed1 c\u00f3 gi\u00e1 tr\u1ecb \u1edf c\u1ea3 \u0111\u1ecbnh d\u1ea1ng th\u1eadp ph\u00e2n v\u00e0 th\u1eadp l\u1ee5c ph\u00e2n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ed d\u1ee5, b\u1ea1n mu\u1ed1n ch\u00e8n k\u00fd hi\u1ec7u b\u1ea3n quy\u1ec1n v\u00e0o HTML, c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00fa ph\u00e1p c\u1ee7a th\u1ef1c th\u1ec3 l\u00e0 &amp;copy; ho\u1eb7c &amp;#169 (Entity Number). L\u01b0u \u00fd b\u1ed5 sung k\u00fd hi\u1ec7u th\u0103ng <strong>#<\/strong> tr\u01b0\u1edbc c\u00e1c Entity Number.<\/span><\/p>\n<pre><span style=\"font-weight: 400;\">&lt;!DOCTYPE html&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">&lt;html&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">&lt;head&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">&lt;title&gt;HTML Character entities&lt;\/title&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">&lt;\/head&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">&lt;body&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><b>&lt;p&gt;Euro &amp;euro;&lt;\/p&gt;<\/b>\r\n\r\n<b>\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;Cent &amp;cent;&lt;\/p&gt;<\/b>\r\n\r\n<b>\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;Copyright &amp;copy;&lt;\/p&gt;<\/b>\r\n\r\n<b>\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;BLACK DIAMOND SUIT &amp;diams;&lt;\/p&gt;<\/b>\r\n\r\n<b>\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;TRADEMARK &amp;trade;&lt;\/p&gt;<\/b>\r\n\r\n<span style=\"font-weight: 400;\">&lt;\/body&gt;\u00a0<\/span>\r\n\r\n<span style=\"font-weight: 400;\">&lt;\/html&gt;<\/span><\/pre>\n<p>K\u1ebft qu\u1ea3 hi\u1ec3n th\u1ecb:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-69995 size-full\" src=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/05\/ki-tu-dac-biet-html-vippro.png\" alt=\"k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML\" width=\"404\" height=\"380\" srcset=\"https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/05\/ki-tu-dac-biet-html-vippro.png 404w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/05\/ki-tu-dac-biet-html-vippro-300x282.png 300w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/05\/ki-tu-dac-biet-html-vippro-200x188.png 200w, https:\/\/itviec.com\/blog\/wp-content\/uploads\/2024\/05\/ki-tu-dac-biet-html-vippro-100x94.png 100w\" sizes=\"auto, (max-width: 404px) 100vw, 404px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p nhi\u1ec1u th\u1ef1c th\u1ec3 trong \u0111o\u1ea1n m\u00e3 HTML, b\u1ea1n c\u00f3 th\u1ec3 t\u00f9y ch\u1ecdn nh\u1eadp ch\u00fang theo c\u00e1ch th\u1ee7 c\u00f4ng ho\u1eb7c sao ch\u00e9p t\u1eeb c\u00e1c b\u1ea3ng t\u1ed5ng h\u1ee3p s\u1eb5n c\u00f3 nh\u01b0 ITviec cung c\u1ea5p d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tuy nhi\u00ean, c\u00f3 m\u1ed9t s\u1ed1 tr\u00ecnh duy\u1ec7t c\u0169 h\u01a1n s\u1ebd kh\u00f4ng th\u1ec3 \u0111\u1ecbnh d\u1ea1ng c\u00e1c t\u00ean th\u1ef1c th\u1ec3. Do \u0111\u00f3, \u0111\u1ec3 c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb ch\u00ednh x\u00e1c tr\u00ean trang web, b\u1ea1n n\u00ean s\u1eed d\u1ee5ng s\u1ed1 th\u1ef1c th\u1ec3 (Entity Number).\u00a0\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tong_hop_%E2%80%9Ctat_tan_tat%E2%80%9D_cac_ki_tu_dac_biet_HTML_pho_bien\"><\/span><b>T\u1ed5ng h\u1ee3p \u201ct\u1ea5t t\u1ea7n t\u1eadt\u201d c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML ph\u1ed5 bi\u1ebfn\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>K\u00ed t\u1ef1 ph\u1ed5 bi\u1ebfn<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 nh\u1eefng k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong HTML, tr\u00ecnh duy\u1ec7t s\u1ebd ph\u00e2n t\u00edch ch\u00fang d\u01b0\u1edbi d\u1ea1ng m\u00e3 HTML v\u00e0 hi\u1ec3n th\u1ecb tr\u00ean trang web \u0111\u1ebfn v\u1edbi ng\u01b0\u1eddi d\u00f9ng.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 k\u00ed t\u1ef1 ph\u1ed5 bi\u1ebfn nh\u01b0:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>K\u00fd hi\u1ec7u<\/b><\/td>\n<td><b>HTML Entities<\/b><\/td>\n<td><b>C\u00f4ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&amp;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;amp;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">B\u1eaft \u0111\u1ea7u c\u1ee7a m\u1ed9t th\u1ef1c th\u1ec3 HTML ho\u1eb7c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&lt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;lt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ph\u1ea7n \u0111\u1ea7u c\u1ee7a th\u1ebb (m\u1edf th\u1ebb)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;gt;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ph\u1ea7n k\u1ebft th\u00fac c\u1ee7a th\u1ebb (\u0111\u00f3ng th\u1ebb)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u201c<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;quot;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1ee3c hi\u1ec3u l\u00e0 ph\u1ea7n \u0111\u1ea7u v\u00e0 ph\u1ea7n cu\u1ed1i c\u1ee7a gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh<\/span><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;nbsp;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1ee3c hi\u1ec3u l\u00e0 kho\u1ea3ng tr\u1eafng c\u1ed1 \u0111\u1ecbnh, hay c\u00f2n g\u1ecdi l\u00e0 non-breaking space<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&#8211;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;ndash;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u g\u1ea1ch ngang (m\u1ed9t n\u1eeda chi\u1ec1u r\u1ed9ng c\u1ee7a \u0111\u01a1n v\u1ecb em)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2013<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;mdash;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u g\u1ea1ch ngang (b\u1eb1ng chi\u1ec1u r\u1ed9ng c\u1ee7a k\u00ed t\u1ef1 \u201cm\u201d)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00a9<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;copy;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u hi\u1ec7u b\u1ea3n quy\u1ec1n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00ae<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;reg;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u hi\u1ec7u \u0111\u00e3 \u0111\u0103ng k\u00fd<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2122<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;trade;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u hi\u1ec7u c\u1ee7a th\u01b0\u01a1ng hi\u1ec7u<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00b0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;deg;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u c\u1ee7a nhi\u1ec7t \u0111\u1ed9 (\u0111\u1ed9 C)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>K\u00ed t\u1ef1 ti\u1ec1n t\u1ec7 (Currencies)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 lo\u1ea1i ti\u1ec1n t\u1ec7 c\u00f3 k\u00ed t\u1ef1 HTML ri\u00eang m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 hi\u1ec3n th\u1ecb tr\u00ean trang web c\u1ee7a m\u00ecnh, c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>K\u00fd hi\u1ec7u<\/b><\/td>\n<td><b>HTML Entities<\/b><\/td>\n<td><b>HTML Entity Number<\/b><\/td>\n<td><b>C\u00f4ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00a3<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;pound;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#36;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bi\u1ec3u t\u01b0\u1ee3ng c\u1ee7a b\u1ea3ng Anh<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u20ac<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;euro;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#128;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bi\u1ec3u t\u01b0\u1ee3ng c\u1ee7a \u0111\u1ed3ng Euro<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">$<\/span><\/td>\n<td><span style=\"font-weight: 400;\">$<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#163;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bi\u1ec3u t\u01b0\u1ee3ng c\u1ee7a \u0111\u1ed3ng Dollar<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00a5<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;yen;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#165;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bi\u1ec3u t\u01b0\u1ee3ng c\u1ee7a \u0111\u1ed3ng Y\u00ean<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00a2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;cent;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#162;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u Cent<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00a4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;curren;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#164;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u chung c\u1ee7a ti\u1ec1n t\u1ec7<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>K\u00fd hi\u1ec7u to\u00e1n h\u1ecdc (Mathematical)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">N\u1ebfu b\u1ea1n thi\u1ebft k\u1ebf m\u1ed9t trang web v\u1ec1 l\u0129nh v\u1ef1c gi\u00e1o d\u1ee5c, \u0111\u1eb7c bi\u1ec7t l\u00e0 To\u00e1n th\u00ec ch\u1eafc h\u1eb3n kh\u00f4ng th\u1ec3 thi\u1ebfu nh\u1eefng k\u00fd hi\u1ec7u chuy\u00ean m\u00f4n v\u1ec1 m\u00f4n h\u1ecdc n\u00e0y.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Trong HTML c\u0169ng c\u00f3 danh s\u00e1ch nh\u1eefng k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t v\u1ec1 To\u00e1n h\u1ecdc gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng l\u1eadp tr\u00ecnh v\u00e0 hi\u1ec3n th\u1ecb ch\u00fang tr\u00ean website nh\u01b0 sau:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>K\u00fd hi\u1ec7u<\/b><\/td>\n<td><b>HTML Entities<\/b><\/td>\n<td><b>HTML Entity Number<\/b><\/td>\n<td><b>C\u00f4ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">&#8211;<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8722;<\/span><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">+<\/span><\/td>\n<td><span style=\"font-weight: 400;\">+<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#43;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u c\u1ed9ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00b1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;plusmn;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#177;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u c\u1ed9ng tr\u1eeb<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">x<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;times;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#215;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u nh\u00e2n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00f7<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;divine;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#247;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u chia<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">%<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#37;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ph\u1ea7n tr\u0103m<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2030<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#137;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ph\u1ea7n ngh\u00ecn<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2248<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;asymp;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8776;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u g\u1ea7n b\u1eb1ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2260<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;ne;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8800;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u kh\u00f4ng b\u1eb1ng nhau<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2264<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;le;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8804;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2265<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;ge;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8805<\/span><\/td>\n<td><span style=\"font-weight: 400;\">L\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u221e<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;infin;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8734;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u v\u00f4 c\u1ef1c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u215b<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8539;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1ed9t ph\u1ea7n t\u00e1m<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00bc<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;frac14;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#188;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1ed9t ph\u1ea7n t\u01b0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u215c<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8540;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ba ph\u1ea7n t\u00e1m<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00bd<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;frac12;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#189;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1ed9t ph\u1ea7n hai<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u222b<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;int;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8747;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u t\u00edch ph\u00e2n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2202<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;part;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8706;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Vi ph\u00e2n t\u1eebng ph\u1ea7n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2206<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8710;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u Delta<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2211<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;sum;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8721;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u Sigma<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u221a<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;radic;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8730;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">K\u00fd hi\u1ec7u c\u0103n b\u1eadc hai<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>K\u00fd hi\u1ec7u d\u1ea5u ph\u1ee5 (Diacritics)<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Nh\u1eefng d\u1ea5u ph\u1ee5 gi\u00fap b\u1ea1n \u0111\u00e1nh d\u1ea5u \u00fd ngh\u0129a c\u1ee7a m\u1ed9t t\u1eeb ho\u1eb7c c\u00e1ch ph\u00e1t \u00e2m kh\u00e1c nhau. M\u1ed9t s\u1ed1 d\u1ea5u ph\u1ee5 ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong HTML nh\u01b0 sau:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>K\u00fd hi\u1ec7u<\/b><\/td>\n<td><b>HTML Entities<\/b><\/td>\n<td><b>HTML Entity Number<\/b><\/td>\n<td><b>C\u00f4ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">`<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#96;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u huy\u1ec1n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02c6<\/span><\/td>\n<td><span style=\"font-weight: 400;\">+<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#136;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u Hachek<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02dc<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;tilde;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#152;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u ng\u00e3<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00a8<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;uml;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#168;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u00c2m s\u1eafc\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00af<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;macr;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#175;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Macron<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00b4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;acute;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#180;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u s\u1eafc<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u00b8<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;cedil;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#184;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Cedilla<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02d8<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;asymp;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#728;<\/span><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02d9<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#729;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ch\u1ea5m<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02da<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#730;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">H\u00ecnh tr\u00f2n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02db<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#731;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u ph\u1ea9y<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02dc<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#732;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u ng\u00e3 nh\u1ecf<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u02dd<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#733;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ngo\u1eb7c k\u00e9p<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>M\u1ed9t s\u1ed1 k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t kh\u00e1c\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 <\/span>k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t<span style=\"font-weight: 400;\">\u00a0kh\u00e1c m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng trong l\u1eadp tr\u00ecnh web nh\u01b0 sau:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>K\u00fd hi\u1ec7u<\/b><\/td>\n<td><b>HTML Entities<\/b><\/td>\n<td><b>HTML Entity Number<\/b><\/td>\n<td><b>C\u00f4ng d\u1ee5ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2660<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;spades;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9824;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ch\u1ea5t b\u00e0i b\u00edch<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2663<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;clubs;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9827;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ch\u1ea5t b\u00e0i chu\u1ed3n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2666<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;diams;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9830;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ch\u1ea5t b\u00e0i r\u00f4<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2665<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;hearts;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9829;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ch\u1ea5t b\u00e0i c\u01a1<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2190<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;larr;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8592;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u0169i t\u00ean tr\u00e1i<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2192<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;rarr;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8594;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u0169i t\u00ean ph\u1ea3i<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2191<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;uarr;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8593;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u0169i t\u00ean h\u01b0\u1edbng l\u00ean<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2193<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;darr;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#8595;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u0169i t\u00ean h\u01b0\u1edbng xu\u1ed1ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2640<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9792;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bi\u1ec3u t\u01b0\u1ee3ng gi\u1edbi t\u00ednh n\u1eef<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2642<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9794;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bi\u1ec3u t\u01b0\u1ee3ng gi\u1edbi t\u00ednh nam<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2669<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9833;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">N\u1ed1t nh\u1ea1c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u266a<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9834;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">N\u1ed1t nh\u1ea1c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u266c<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9836;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">N\u1ed1t nh\u1ea1c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u266d<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9837;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">N\u1ed1t nh\u1ea1c<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u266f<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9839;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">D\u1ea5u th\u0103ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u273f<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#10047<\/span><\/td>\n<td><span style=\"font-weight: 400;\">B\u00f4ng hoa m\u00e0u \u0111en<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u263b<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9787;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1eb7t c\u01b0\u1eddi m\u00e0u \u0111en<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u263a<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9786;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1eb7t c\u01b0\u1eddi m\u00e0u tr\u1eafng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2639<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9785;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1eb7t bu\u1ed3n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u2638<\/span><\/td>\n<td><\/td>\n<td><span style=\"font-weight: 400;\">&amp;#9784;<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hoa tuy\u1ebft<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Cac_cau_hoi_thuong_gap_ve_ki_tu_dac_biet_HTML\"><\/span><b>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><b>L\u1ee3i \u00edch c\u1ee7a k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML l\u00e0 g\u00ec?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh c\u00f4ng d\u1ee5ng n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng tr\u00ean trang web, k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t c\u00f2n \u0111em l\u1ea1i m\u1ed9t s\u1ed1 l\u1ee3i \u00edch nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>T\u1ed1i \u01b0u h\u00f3a c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm:<\/b><span style=\"font-weight: 400;\"> HTML Entities cho ph\u00e9p hi\u1ec3n th\u1ecb ch\u00ednh x\u00e1c c\u00e1c k\u00ed t\u1ef1 tr\u00ean trang web, t\u1eeb \u0111\u00f3 SEO c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch ch\u00fang m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t \u1edf c\u00e1c lo\u1ea1i ti\u00eau \u0111\u1ec1 ho\u1eb7c th\u1ebb Meta \u0111\u1ec3 c\u00f4ng vi\u1ec7c t\u1ed1i \u01b0u trang web h\u1eefu \u00edch h\u01a1n.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>N\u00e2ng cao b\u1ed1 c\u1ee5c trang web:<\/b><span style=\"font-weight: 400;\"> Hi\u1ec3u v\u00e0 k\u1ebft h\u1ee3p HTML v\u00e0o l\u1eadp tr\u00ecnh web c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng n\u00e2ng cao k\u1ef9 n\u0103ng c\u1ee7a b\u1ea3n th\u00e2n c\u0169ng nh\u01b0 t\u0103ng tr\u1ea3i nghi\u1ec7m c\u1ee7a trang web \u0111\u1ebfn v\u1edbi ng\u01b0\u1eddi d\u00f9ng.\u00a0<\/span><\/li>\n<\/ul>\n<h3><b>Tham kh\u1ea3o th\u00eam c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t \u1edf \u0111\u00e2u?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 tham kh\u1ea3o \u0111\u1ea7y \u0111\u1ee7 danh s\u00e1ch k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t s\u1ed1 ngu\u1ed3n t\u00e0i li\u1ec7u nh\u01b0:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/www.w3schools.com\/charsets\/ref_html_entities_4.asp\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">W3School HTML Entities<\/span><\/a><span style=\"font-weight: 400;\">: Cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong HTML4 v\u00e0 phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t HTML5.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Glossary\/Entity\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">MDN Entity<\/span><\/a><span style=\"font-weight: 400;\">: T\u1ed5ng h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t trong HTML, k\u1ec3 c\u1ea3 nh\u1eefng k\u00ed t\u1ef1 \u00edt th\u00f4ng d\u1ee5ng nh\u1ea5t.\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh \u0111\u00f3, \u0111\u1ec3 t\u00ecm hi\u1ec3u chuy\u00ean s\u00e2u v\u1ec1 HTML, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam c\u00e1c kh\u00f3a h\u1ecdc c\u1ee7a HubSpot, <\/span><a href=\"https:\/\/www.freecodecamp.org\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Freecodecamp<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/www.udemy.com\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Udemy<\/span><\/a><span style=\"font-weight: 400;\"> ho\u1eb7c Coursera,&#8230; \u0111\u1ec3 c\u00f3 l\u1ed9 tr\u00ecnh h\u1ecdc HTML c\u0169ng nh\u01b0 CSS \u0111\u1ea7y \u0111\u1ee7 v\u00e0 hi\u1ec7u qu\u1ea3 nh\u00e9!\u00a0<\/span><\/p>\n<p>Ngo\u00e0i ra, b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u danh s\u00e1ch c\u00e1c b\u00e0i vi\u1ebft thu\u1ed9c ch\u1ee7 \u0111\u1ec1 HTML \u0111\u1ec3 x\u00e2y d\u1ef1ng trang web ho\u00e0n ch\u1ec9nh v\u1edbi HTML:<\/p>\n<ul>\n<li><a href=\"https:\/\/itviec.com\/blog\/html-la-gi\/\" target=\"_blank\" rel=\"noopener\"><b>Gi\u1ea3i \u0111\u00e1p \u201ct\u1ea5t t\u1ea7n t\u1eadt\u201d nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 HTML<\/b><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/table-html\/\" target=\"_blank\" rel=\"noopener\"><strong>Table HTML: H\u01b0\u1edbng d\u1eabn c\u00e1ch t\u1ea1o b\u1ea3ng trong HTML chi ti\u1ebft t\u1eeb A \u2013 Z<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/bang-mau-html\/\" target=\"_blank\" rel=\"noopener\"><strong>T\u1ed5ng h\u1ee3p chi ti\u1ebft v\u00e0 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t v\u1ec1 B\u1ea3ng m\u00e0u HTML<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/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><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/chen-khoang-trang-html\/\" target=\"_blank\" rel=\"noopener\"><strong>G\u1ee3i \u00fd 4 c\u00e1ch ch\u00e8n kho\u1ea3ng tr\u1eafng HTML \u0111\u01a1n gi\u1ea3n<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/font-html\/\" target=\"_blank\" rel=\"noopener\"><strong>T\u1ed5ng h\u1ee3p 10+ font HTML ph\u1ed5 bi\u1ebfn cho trang web hi\u1ec7n nay<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/login-form-html\/\" target=\"_blank\" rel=\"noopener\"><strong>H\u01b0\u1edbng d\u1eabn c\u00e1ch t\u1ea1o login form HTML \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 th\u1ef1c hi\u1ec7n<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/xuong-dong-trong-html\/\" target=\"_blank\" rel=\"noopener\"><strong>H\u01b0\u1edbng d\u1eabn c\u00e1ch xu\u1ed1ng d\u00f2ng trong HTML \u0111\u01a1n gi\u1ea3n v\u00e0 nhanh ch\u00f3ng<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/itviec.com\/blog\/bai-tap-html\/\" target=\"_blank\" rel=\"noopener\"><strong>T\u1ed5ng h\u1ee3p 12+ b\u00e0i t\u1eadp HTML &amp; CSS c\u01a1 b\u1ea3n cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/strong><\/a><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Tong_ket_ve_ki_tu_dac_biet_HTML\"><\/span><b>T\u1ed5ng k\u1ebft v\u1ec1 k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">C\u00e1c <\/span><b>k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML<\/b><span style=\"font-weight: 400;\"> gi\u00fap b\u1ea1n t\u1ea1o n\u1ed9i dung th\u00eam phong ph\u00fa, h\u1ea5p d\u1eabn v\u00e0 d\u1ec5 ti\u1ebfp c\u1eadn v\u1edbi ng\u01b0\u1eddi d\u00f9ng. S\u1eed d\u1ee5ng c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t m\u1ed9t c\u00e1ch \u0111\u00fang \u0111\u1eafn v\u00e0 hi\u1ec7u qu\u1ea3 s\u1ebd gi\u00fap n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng trang web t\u1ed1i \u01b0u c\u0169ng nh\u01b0 thu h\u00fat nhi\u1ec1u ng\u01b0\u1eddi h\u01a1n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hy v\u1ecdng qua b\u00e0i vi\u1ebft, b\u1ea1n c\u00f3 th\u1ec3 t\u00edch l\u0169y th\u00eam \u0111\u01b0\u1ee3c n\u1ec1n t\u1ea3ng ki\u1ebfn th\u1ee9c chuy\u00ean s\u00e2u v\u1ec1 HTML. H\u1ecdc HTML h\u00f4m nay kh\u00f4ng l\u00e0 qu\u00e1 mu\u1ed9n \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 chinh ph\u1ee5c \u0111am m\u00ea c\u0169ng nh\u01b0 \u0111em l\u1ea1i nhi\u1ec1u c\u01a1 h\u1ed9i th\u0103ng ti\u1ebfn h\u1ea5p d\u1eabn trong c\u00f4ng vi\u1ec7c.<\/span><\/p>\n<blockquote><p><span style=\"font-weight: 400;\">Tham kh\u1ea3o <\/span><strong><a href=\"https:\/\/itviec.com\/it-jobs\/front-end\/\" target=\"_blank\" rel=\"noopener\">Vi\u1ec7c l\u00e0m Front-end<\/a><\/strong><span style=\"font-weight: 400;\"> h\u1ea5p d\u1eabn tr\u00ean ITviec!<\/span><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u00f4i khi b\u1ea1n mu\u1ed1n g\u00f5 c\u00e1c k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML nh\u01b0ng ch\u00fang l\u1ea1i kh\u00f4ng ph\u1ed5 bi\u1ebfn v\u00e0 kh\u00f4ng th\u1ec3 g\u00f5 b\u1eb1ng b\u00e0n ph\u00edm th\u00f4ng th\u01b0\u1eddng nh\u01b0 k\u00fd hi\u1ec7u to\u00e1n h\u1ecdc, b\u1ea3n quy\u1ec1n hay ti\u1ec1n t\u1ec7,&#8230; B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ebfn c\u00e1c th\u1ef1c th\u1ec3 HTML (HTML Entities) \u0111\u1ec3 ch\u00e8n ch\u00fang v\u00e0o trang web m\u1ed9t [&hellip;]<\/p>\n","protected":false},"author":207,"featured_media":70114,"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-69987","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 v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>T\u1ed5ng h\u1ee3p 70+ k\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t - ITviec Blog<\/title>\n<meta name=\"description\" content=\"K\u00ed t\u1ef1 \u0111\u1eb7c bi\u1ec7t HTML gi\u00fap n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. 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