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
vat dung » van dung, viet dung, mat duong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than cap
va dung » van dung, va duong, va ung

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: ho chieu sach - thanh trung ((va dung) OR (vat dung)) ((cong dan) OR (cong tan)) than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh trung ((va dung) or (vat dung)) ((cong dan) OR (cong tan)) than cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung ((va dung) or (vat dung)) ((cong dan) OR (cong tan)) than cao*.