Perhaps you should try some spelling variations:
nhung tuong » nhung phuong, hung vuong, nhung cong
nhung huong » nhung phuong, nhung cong, nhung dung
chieu sach » chinh sach, chiet tach, chieu sang
hanh luan » khanh luan, hang luan, hanh luat
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan ban
toan cao » toan ban

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

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