Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
hoc hieu » hoc thieu, hoc hien, doc hieu
tran van » luan van
cong san » cong tac
toan cao » toan tap
toan ban » van 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: hoc hieu nganh - hanh tran van nhung ((huong dan) OR (cong san)) ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh tran van nhung ((huong dan) or (cong san)) ((toan cao) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh tran van nhung ((huong dan) or (cong san)) ((toan cao) OR (toan ban))*.