Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thanh tran » thanh trang, thanh toan, thanh tra
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (chieu sach)) - thanh tran quang trong cong tan ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - thanh tran quang trong cong tan ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chieu sach)) - thanh tran quang trong cong tan ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chieu sach)) - thanh tran quang trong cong tan ((than cau) OR (phan cau))*.