Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
dung thuat » vuong thuat, dung thuoc, dung chat
thuat nang » thuat bang, thuat mang, thuat trang
doi chieu » doc hieu, doi chi, ho chieu
nang cong » nang song, dang cong, bang cong
tac nhan » cac nhan, dac nhan, tan nhan
tao nhan » ca nhan, tue nhan, tri nhan

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 thuat nang cong ((tac nhan) OR (tao nhan)) cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh dung thuat nang cong ((tac nhan) or (tao nhan)) cau*.