Perhaps you should try some spelling variations:
dong phong » duong phong, dong phuong, dong thong
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
phong van » phung van, thong van, phong va
cua dong » chua dong, cua cong, cua dang
van toan » van tuan, van tan, van thanh
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: hoi ((hieu lang) OR (hieu qua)) - hanh doanh cua dong phong van toan tap~.
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) or (hieu qua)) - hanh doanh cua dong phong van toan tap*.