Perhaps you should try some spelling variations:
dong thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
chau tinh » cuu tinh, ha tinh, cua tinh
thanh lua » thanh luu, thanh qua, tranh luan
dang cong » dung cong
lua dang » cua dang, lua sang, luan nang
cong tac » cong ty
tac phi » tac thi, tac phu, tac pham
phi phi » chi phi, phi thi, thi phi

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 (chau tinh)) - dong thanh lua dang cong tac phi phi~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chau tinh)) - dong thanh lua dang cong tac phi phi".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chau tinh)) - dong thanh lua dang cong tac phi phi*.