Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (dieu hanh)) - hanh tranh cua ((cong cong) or (dung cong)) van tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (dieu hanh)) - hanh tranh cua ((cong cong) OR (dung cong)) van tan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (dieu hanh)) - hanh tranh cua ((cong cong) or (dung cong)) van tan cau*.