Perhaps you should try some spelling variations:
nhung tuong » nhung phuong, hung vuong, nhung cong
nhung huong » nhung phuong, nhung cong, nhung dung
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - hanh tang luan ((nhung huong) OR (nhung tuong)) dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh tang luan ((nhung huong) OR (nhung tuong)) dan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - hanh tang luan ((nhung huong) OR (nhung tuong)) dan ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh tang luan ((nhung huong) OR (nhung tuong)) dan ((toan cao) or (toan ban))*.