Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
quang va » quang van, quan va, quang ma
dan toan » van toan, dan than, xuan toan
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 - nhanh quang va dung cong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - nhanh quang va dung cong ((dan toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh quang va dung cong ((dan toan) or (manh toan)) cao*.