Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh thanh, dong doanh
nhung huong » nhung phuong, nhung tuong, nhung cong
doanh hoan » doanh khoa, doanh nhan, doanh luan
huong doan » phuong doan, huong dan, huong loan
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu lang - ((doanh doanh) or (doanh hoan)) cua nhung huong doan ((phan lap) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu lang - ((doanh doanh) OR (doanh hoan)) cua nhung huong doan ((phan lap) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu lang - ((doanh doanh) or (doanh hoan)) cua nhung huong doan ((phan lap) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - ((doanh doanh) or (doanh hoan)) cua nhung huong doan ((phan lap) OR (phan dau))*.