Perhaps you should try some spelling variations:
dung cong » dung trong
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
tranh va » tranh van, trang va, trinh va
dan toan » van toan, dan than, manh toan
va dung » van dung, va duong, vat dung
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) or (chi hanh)) - canh tranh va dung cong ((dan toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - canh tranh va dung cong ((dan toan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi hanh)) - canh tranh va dung cong ((dan toan) or (van tan)) cau*.