Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
van dung » van dong, xay dung, tin dung
van hung » manh hung, van duong, van dong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban
ho chau » ha chau, ho chu, o chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chau tinh - canh tranh ((van dung) or (van hung)) cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chau tinh - canh tranh ((van dung) OR (van hung)) cong tap toan ban.
• Adding a wildcard symbol may retrieve word variants: ho chau tinh - canh tranh ((van dung) or (van hung)) cong tap toan ban*.