Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh luan » doanh nhan
thach thuc » thuc thuc, thanh thuy, cach thuc
doi chieu » doc hieu, doi chi, mot chieu
van doanh » toan doanh, van dong, van thanh
luan dang » luan nang, luan danh, luan dong
thong van » trong van, thong va, thong quan

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 - van doanh luan dang ((thong van) or (phung van)) thach thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - van doanh luan dang ((thong van) OR (phung van)) thach thuc.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - van doanh luan dang ((thong van) or (phung van)) thach thuc*.