Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, nhung don
hieu lang » hieu quang, nhieu tang, hieu van
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
dien dan » hien dai, vien dai, gian dan
dan ba » dan bac, dan ca, dan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (hieu lang)) - hanh doanh cua ((nhung cong) OR (hang cong)) dien dan ba~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - hanh doanh cua ((nhung cong) OR (hang cong)) dien dan ba.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu lang)) - hanh doanh cua ((nhung cong) OR (hang cong)) dien dan ba".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hanh doanh cua ((nhung cong) OR (hang cong)) dien dan ba*.