Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
doanh luan » doanh nhan
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang dau

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

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