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
va duong » van duong, va tuong, va huong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap
va dung » van dung, vat dung, va ung

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 ((va dung) or (va duong)) ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung ((va dung) OR (va duong)) ((cong dan) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh trung ((va dung) or (va duong)) ((cong dan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung ((va dung) or (va duong)) ((cong dan) OR (cong san)) toan cao*.