<http://schema.org/headline>
"\u00D4n thi trung h\u1ECDc ph\u1ED5 th\u00F4ng qu\u1ED1c gia tr\u1EF1c tuy\u1EBFn v\u1EDBi gi\u00E1 2.500 \u0111\u1ED3ng "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.vietnamplus.vn/on-thi-trung-hoc-pho-thong-quoc-gia-truc-tuyen-voi-gia-2500-dong/376255.vnp>