Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
cua nhung » va nhung
luan hoan » luan van
hoi hieu » hoi phieu, hoi tieu, moi hieu
ho hieu » ho chieu, nho hieu, co hieu

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

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