Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tan » cong tac, cong ty, cong ha
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - canh tranh cua nhung ((((cong tan) or (cong thanh))) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh tranh cua nhung ((((cong tan) OR (cong thanh))) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tranh cua nhung ((((cong tan) or (cong thanh))) or (cong san)) toan cau*.