Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
doanh luat » doanh luan, doanh xuat, doanh cua
thong cong » tong cong, thong thong, phong chong
hieu lang » hieu quang, nhieu tang, hieu van
tran tap » toan tap, tran tan, tran tuan

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 sang) OR (hieu lang)) - hanh doanh luat ((thong cong) OR (trong cong)) tan tran tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - hanh doanh luat ((thong cong) OR (trong cong)) tan tran tap~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - hanh doanh luat ((thong cong) OR (trong cong)) tan tran tap*.