Tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc \u0111\u1ea7u ti\u00ean c\u00f4ng b\u1ed1 \u0111i\u1ec3m chu\u1ea9n t\u1eeb k\u1ebft qu\u1ea3 thi \u0111\u00e1nh gi\u00e1 n\u0103ng l\u1ef1c<\/a><\/blockquote><\/iframe>