Perhaps you should try some spelling variations:
nhung dong » nhung don, nhung dung, nhung bong
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
doanh phan » doanh nhan, doan phan, doanh thanh
hieu lang » hieu quang, nhieu tang, hieu van
anh cua » manh cua, hanh cua, canh cua

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)) - tuan anh cua ((nhung dong) OR (nhung cong)) doanh phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - tuan anh cua ((nhung dong) OR (nhung cong)) doanh phan tu~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - tuan anh cua ((nhung dong) OR (nhung cong)) doanh phan tu*.