Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
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 - hanh tranh cua dung ((cong tan) or (cong thanh)) ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tranh cua dung ((cong tan) OR (cong thanh)) ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tranh cua dung ((cong tan) or (cong thanh)) ((toan cau) or (toan tap))*.