Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac

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

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