Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
doi chieu » doc hieu, doi chi, mot chieu
cua thong » cua thuong, cua khong, cua tong
thong dan » thong van, tuong dan, thong den
xuong dan » huong dan, xuong san, tuong dan
dung cua » dung luan, dung cho

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh dung cua thong ((thong dan) OR (xuong dan)) van ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh dung cua thong ((thong dan) or (xuong dan)) van ban*.