Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
hang luan » tang luan, dung luan
hieu manh » chieu xanh, hieu nganh, hien hanh
luan hung » luan chung, lan hung, luan ung
anh hang » anh hoang, anh hung, anh bang
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - anh hang luan hung ((cong tan) OR (cong thanh)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (dieu hanh)) - anh hang luan hung ((cong tan) OR (cong thanh)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (dieu hanh)) - anh hang luan hung ((cong tan) OR (cong thanh)) toan cau*.