Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh tranh » canh tranh, hanh trinh, hanh trang
cua nong » cua cong, cuu nong, cua song
cua dong » chua dong, cua cong, cua dang
cong san » cong tac
san tan » van tan, san van, san tay
tan tat » ban tat, toan tap, toan tai

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 (chinh sach)) - hanh tranh ((cua nong) or (cua dong)) cong san tan tat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chinh sach)) - hanh tranh ((cua nong) OR (cua dong)) cong san tan tat.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chinh sach)) - hanh tranh ((cua nong) or (cua dong)) cong san tan tat*.