Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung cap » truong cao, trung tam
tran tuan » tran xuan, tran quang, tran thanh
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
toan ban » van ban

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 - hanh ((trung cap) OR (tran tuan)) dang cong danh ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trung cap) or (tran tuan)) dang cong danh ((toan tap) or (toan ban))*.