Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
dang cong » dung cong
cong tac » cong ty
lua dang » cua dang, lua sang, luan nang
cong tan » cong san, cong thanh, cong ty
ha tinh » va tinh, may tinh
tac lua » tac cua, tac quan, cac luat
tan phi » tac phi, tan phu, toan phai
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 (ha tinh)) - cong tac lua dang cong tan phi phi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (ha tinh)) - cong tac lua dang cong tan phi phi.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (ha tinh)) - cong tac lua dang cong tan phi phi*.