Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
dang cong » dung cong
tung van » trung van, tang van, dung van
van dang » van dong, van dung, van nang
tan toan » tap toan, van toan, dan toan

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 tung van dang cong ((tan toan) or (tan tran)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh tung van dang cong ((tan toan) OR (tan tran)) tap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung van dang cong ((tan toan) or (tan tran)) tap*.