<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://caycanhhanoi.com/?page=shop.product_details&category_id=11&flypage=flypage_new.tpl&product_id=66&vmcchk=1&option=com_virtuemart&Itemid=124>