<http://schema.org/headline>
"Ng\u00E2n s\u00E1ch chi cho khoa h\u1ECDc nhi\u1EC1u n\u01A1i s\u1EED d\u1EE5ng kh\u00F4ng h\u1EBFt"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.baomoi.com/ngan-sach-chi-cho-khoa-hoc-nhieu-noi-su-dung-khong-het/c/20505531.epi>