Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
dung cong » dung trong
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 ((chieu xanh) or (chieu sach)) - hanh tranh va dung cong ((dan toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - hanh tranh va dung cong ((dan toan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - hanh tranh va dung cong ((dan toan) or (van tan)) cau*.