Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
thanh lap » thanh san, phan lap, thanh hai
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty

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 - ((thanh trung) or (thanh tung)) cua thong ((cong tan) OR (cong tac)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((thanh trung) OR (thanh tung)) cua thong ((cong tan) OR (cong tac)) thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((thanh trung) or (thanh tung)) cua thong ((cong tan) OR (cong tac)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((thanh trung) or (thanh tung)) cua thong ((cong tan) OR (cong tac)) thanh lap*.