<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.vietfuntravel.com.vn/blog/nhung-dieu-nhat-thiet-phai-luu-y-neu-muon-di-du-lich-con-dao.html>