Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu sach, chieu xanh, nhieu tang
trong quan » thong quan, tong quan, thong quang
quan nhung » qua nhung, cua nhung, luan chung
hieu lang » hieu quang, nhieu tang, hieu van
thanh cap » thanh lap, hanh cap, than cap
cong ban » cong bang, cong tan, cong dan
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) OR (hieu lang)) - thanh trong quan nhung ((cong ban) or (cong san)) thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - thanh trong quan nhung ((cong ban) OR (cong san)) thanh cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (hieu lang)) - thanh trong quan nhung ((cong ban) or (cong san)) thanh cap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (hieu lang)) - thanh trong quan nhung ((cong ban) or (cong san)) thanh cap*.