<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://diemthi.24h.com.vn/dap-an-de-thi-dai-hoc/dap-an-de-thi-dai-hoc-mon-tieng-anh-khoi-a1-nam-2012-dtdadhcd4566.html>