Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, ho chieu
cua nhung » va nhung
cua dang » cua ban
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan ban » tuan bang, toan ban, luan 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 tranh ((((cua dang) OR (cua cong))) OR (cua nhung)) cong van tuan ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh tranh ((((cua dang) or (cua cong))) or (cua nhung)) cong van tuan ban*.