Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
tranh van » tran van, trinh van, thanh van
dang cong » dung cong
van dang » van dong, van dung, van nang
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
o chau » a chau, 3 chau, moc 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 tinh - canh tranh van dang cong ((dan toan) OR (dan than)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "o chau tinh - canh tranh van dang cong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: o chau tinh - canh tranh van dang cong ((dan toan) OR (dan than)) cao*.