<http://schema.org/headline>
"S\u1EED d\u1EE5ng v\u1EADt li\u1EC7u sinh h\u1ECDc c\u00F3 \u0111\u1ED9 \u0111\u00E0n h\u1ED3i cao \u0111\u1EC3 t\u00E1i t\u1EA1o x\u01B0\u01A1ng"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.vietnamplus.vn/su-dung-vat-lieu-sinh-hoc-co-do-dan-hoi-cao-de-tai-tao-xuong/408467.vnp>