Perhaps you should try some spelling variations:
canh thanh » canh tranh, danh thanh, anh thanh
thanh van » thanh san, thanh toan, thanh phan
hien anh » hien hanh, thien anh, dien anh
van hung » van dung, manh hung, van duong
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien anh - canh thanh van hung ((cong tan) or (cong tac)) ((can cau) or (van dao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien anh - canh thanh van hung ((cong tan) OR (cong tac)) ((can cau) OR (van dao)).
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - canh thanh van hung ((cong tan) or (cong tac)) ((can cau) or (van dao))*.