Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lanh manh » lanh tranh, lan anh, van manh
cua dong » chua dong, cua cong, cua nong
cua dang » cua cong, cua ban
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (dieu hanh)) - lanh manh ((cua dong) or (cua dang)) cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (dieu hanh)) - lanh manh ((cua dong) OR (cua dang)) cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (dieu hanh)) - lanh manh ((cua dong) or (cua dang)) cong dan than cao*.