<http://schema.org/headline>
"C\u00E1ch t\u00EDnh l\u01B0\u01A1ng h\u01B0u v\u1EDBi tr\u01B0\u1EDDng h\u1EE3p \u0111\u01B0\u1EE3c c\u1ED9ng n\u1ED1i th\u1EDDi gian c\u00F4ng t\u00E1c"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.baomoi.com/cach-tinh-luong-huu-voi-truong-hop-duoc-cong-noi-thoi-gian-cong-tac/c/6326113.epi>