Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
nhieu tang » chieu sang, nhiet nang
bang huong » bang phuong, ban huong, bang suong
hieu lang » chieu sang, hieu quang, hieu van
doanh cua » doanh luan
cua bang » chua bang, cua ban, cua dang
toan tap » toan ban

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 ((hieu lang) OR (nhieu tang)) - canh doanh cua bang huong dan ((toan tap) OR (van ban))~.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (nhieu tang)) - canh doanh cua bang huong dan ((toan tap) or (van ban))*.