Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chau tinh » cuu tinh, ha tinh, cua tinh
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
san toan » dan toan, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
va dung » van dung, va duong, vat dung

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 sach) or (chau tinh)) - canh tranh va dung cong ((san toan) OR (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chau tinh)) - canh tranh va dung cong ((san toan) OR (van toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chau tinh)) - canh tranh va dung cong ((san toan) OR (van toan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chau tinh)) - canh tranh va dung cong ((san toan) OR (van toan)) cau*.