Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
tuan trong » thuan trong, quan trong, toan trong
tran trong » gian trong, quan trong, tran hong
doi chieu » doc hieu, doi chi, ho chieu
cong tac » cong ty
tac khan » tac nhan, cac khoan, tac chuan
khan ap » khan cap, han ap, khan dam

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 ((tuan trong) or (tran trong)) cong tac khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung ((tuan trong) OR (tran trong)) cong tac khan ap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung ((tuan trong) or (tran trong)) cong tac khan ap*.