Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
lanh minh » lanh dinh, lanh manh, thanh minh
dung cong » dung trong
than phan » thanh phan, toan phan, thanh pham
tan phan » toan phan, van phan, tai phan
minh va » tinh va, sinh va, sinh vat
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 - lanh minh va dung cong ((tan phan) or (than phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - lanh minh va dung cong ((tan phan) OR (than phan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - lanh minh va dung cong ((tan phan) or (than phan)) cau*.