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, mot chieu
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
van toan » van tuan, van tan, van 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 tranh cua ((dong cong) OR (dang cong)) van toan ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh tranh cua ((dong cong) or (dang cong)) van toan ban*.