Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
luan chung » luan chinh
doi chieu » doc hieu, doi chi, ho chieu
trong van » trong cac
duong van » duong va, luong va, dang van
dong va » dung va, dong ha, luong va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh trinh luan chung ((((dong va) OR (trong van))) OR (duong van)) dan ca~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh trinh luan chung ((((dong va) or (trong van))) or (duong van)) dan ca*.