Perhaps you should try some spelling variations:
theo lieu » theo tieu, theo chieu, thi lieu
tang luan » dung luan
luan hung » luan chung, lan hung, luan ung
theo yeu » theo tieu, thiet yeu, theo chu
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo lieu) or (theo yeu)) tinh - anh tang luan hung ((cong san) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo lieu) OR (theo yeu)) tinh - anh tang luan hung ((cong san) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo lieu) or (theo yeu)) tinh - anh tang luan hung ((cong san) or (cong tac)) toan cau*.