Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
canh tinh » hanh tinh, manh tinh, canh tranh
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan
tinh va » tich va, trinh van, trinh vat
va dang » van dang, va nang, va lang

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 - canh tinh va dang cong ((dan toan) or (manh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh tinh va dang cong ((dan toan) OR (manh toan)) tap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tinh va dang cong ((dan toan) or (manh toan)) tap*.