Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
tang manh » tung manh, dang manh, tang hanh
manh hung » anh huong
khoan cam » khoa cam, khoan va, phan cam
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
than cap » khan cap, thanh lap, thanh cac

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 tinh - anh tang manh hung ((cong san) or (cong tac)) ((than cap) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - anh tang manh hung ((cong san) OR (cong tac)) ((than cap) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - anh tang manh hung ((cong san) or (cong tac)) ((than cap) or (khoan cam))*.