Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
tranh van » tran van, trinh van, thanh van
van hung » van dung, manh hung, van duong
cong tac » cong ty
phan cau » phan dau, phan cac, phan lap

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 - canh tranh van hung ((cong tac) or (cong thanh)) ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - canh tranh van hung ((cong tac) OR (cong thanh)) ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - canh tranh van hung ((cong tac) or (cong thanh)) ((phan cau) or (phan tu))*.