Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
trung he » trung ha, trong he, trung hieu
he trong » he thong, he trung, le trong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh trung he trong ((cong dan) or (cong san)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung he trong ((cong dan) OR (cong san)) than ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung he trong ((cong dan) or (cong san)) than ban*.