Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
anh hang » anh hoang, anh hung, anh bang
toan cau » toan cao, toan ban, toan tap
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: theo ((chieu sach) or (chiu trach)) - anh hang va dung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiu trach)) - anh hang va dung cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiu trach)) - anh hang va dung cong manh toan cau*.