Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
tran hung » tran hong, tran quang, tran hoang
anh quan » anh tuan, ban quan, anh quoc
anh nhan » danh nhan, doanh nhan, thanh nhan
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
doan cau » toan cau, doan dau, doan cap

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 - ((anh quan) OR (anh nhan)) tran hung ((cong tap) OR (cong tac)) doan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((anh quan) or (anh nhan)) tran hung ((cong tap) OR (cong tac)) doan cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((anh quan) or (anh nhan)) tran hung ((cong tap) OR (cong tac)) doan cau*.