Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung qua » trung quan, trong qua, truong quan
trung cua » truong cua, trung tuan, trung cap
tan thanh » tran thanh, tang thanh, toan thanh
thanh cap » thanh lap, hanh cap, than cap
cong tan » cong tac, cong san, cong thanh

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

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