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 cao » truong cao, trung cap, trung co
hang cong » dang cong, hang nong, bang cong
cao hang » cao dang, cao tang, cao bang
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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 cao hang cong ((dan than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung cao hang cong ((dan than) OR (dan chan)) cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung cao hang cong ((dan than) or (dan chan)) cao*.