Perhaps you should try some spelling variations:
canh thanh » canh tranh, danh thanh, anh thanh
thanh van » thanh san, thanh toan, thanh phan
dong cong » duong cong, dung cong, dang cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
o chau » 3 chau, moc chau
a chau » ha chau, lai chau, hat chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((o chau) OR (a chau)) tinh - canh thanh van dong cong ((dan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((o chau) OR (a chau)) tinh - canh thanh van dong cong ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((o chau) OR (a chau)) tinh - canh thanh van dong cong ((dan toan) or (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: ((o chau) OR (a chau)) tinh - canh thanh van dong cong ((dan toan) or (dan than)) cao*.