Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
dang cong » dung cong
cua dang » cua cong, cua ban
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van toan
toan cau » toan cao, toan ban, toan tap

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: theo ((chieu sach) OR (((hieu lang) OR (hieu qua)))) - toan doanh cua dang cong ban toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (((hieu lang) or (hieu qua)))) - toan doanh cua dang cong ban toan cau*.