Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
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: hoi hieu lang - canh tranh cua nhung ((cong dan) or (cong tac)) ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - canh tranh cua nhung ((cong dan) OR (cong tac)) ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - canh tranh cua nhung ((cong dan) or (cong tac)) ((toan cau) or (toan cao))*.