Perhaps you should try some spelling variations:
dong phong » duong phong, dong phuong, dong thong
hanh doanh » hang doanh, chinh doanh, doanh doanh
dong thanh » truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
hoi hieu » hoi phieu, hoi tieu, moi hieu
toan tap » toan ban
va toan » van toan, bai toan, tap toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh doanh cua ((dong phong) or (dong thanh)) va toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh doanh cua ((dong phong) OR (dong thanh)) va toan tap.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh doanh cua ((dong phong) or (dong thanh)) va toan tap*.