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
dang dong » dang cong, dung dong, dan dong
dong bang » dong san
bang phan » nang phan, bang nhan, bang thanh

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 dang dong bang phan tu~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung cao dang dong bang phan tu*.