Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
toan tuan » tran tuan, toan quan, doan tuan
dung cong » dung trong
van quan » van ban
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan tai » pham tai, nhan tai, phan thi

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