Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tra » thanh toan, thanh hoa
tra quang » tran quang, tra quan, tri quang
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - thanh tra quang trong cong ban than cau~.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sach)) - thanh tra quang trong cong ban than cau*.