Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
manh truong » manh trung, manh tuong, anh truong
den thanh » de thanh, dinh thanh, dong thanh
quan hanh » quan thanh, quang thanh, quang khanh
cong tan » cong san, cong thanh, cong ty
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: hoc ((den thanh) or (tien thinh)) - manh truong quan hanh ((cong tan) OR (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((den thanh) OR (tien thinh)) - manh truong quan hanh ((cong tan) OR (cong tac)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((den thanh) or (tien thinh)) - manh truong quan hanh ((cong tan) OR (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((den thanh) or (tien thinh)) - manh truong quan hanh ((cong tan) OR (cong tac)) toan cau*.