Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung cong, nhung dung
nhung tuong » nhung phuong, hung vuong, nhung cong
duoc hien » duoc thien, duoc dien, duoc bien
hien hanh » dieu hanh
tranh va » tranh van, trang va, trinh va
toan cao » toan ban
toan tap » toan ban

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: duoc hien hanh - canh tranh va ((nhung huong) OR (nhung tuong)) dan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "duoc hien hanh - canh tranh va ((nhung huong) OR (nhung tuong)) dan ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: duoc hien hanh - canh tranh va ((nhung huong) OR (nhung tuong)) dan ((toan cao) or (toan tap))*.