Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
trinh qua » trinh quan, trinh cua, trinh quang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
qua dung » quang dung, su dung, qua song
cong san » cong tac
phan dau » hang dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - canh trinh qua dung cong san ((phan dau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh trinh qua dung cong san ((phan dau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trinh qua dung cong san ((phan dau) or (phan tu))*.