<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.kilobooks.com/giao-an-hoa-10-bai-bai-thuc-hanh-so-3-tinh-chat-hoa-hoc-cua-brom-va-iot-185213>