Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
tong cong » trong cong, cong cong, dung cong
cong dang » cong dong, cong dan, cong dung
dang van » hoang van, hang va
van dau » van dao, phan dau

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 - hanh ((trinh quan) or (tinh quang)) tong cong dang van dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh quan) OR (tinh quang)) tong cong dang van dau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh quan) or (tinh quang)) tong cong dang van dau*.