Perhaps you should try some spelling variations:
hanh luan » khanh luan, hang luan, hanh luat
van nhung » van nhuong, va nhung, van hung
cuong tap » luong tap, cong tac, luong tai
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
cong tap » cong tac, cong tan, tong tap
doan tap » toan tap, doan cap, doanh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (theo chu)) xanh - hanh luan van nhung ((cong tap) OR (cuong tap)) doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chu)) xanh - hanh luan van nhung ((cong tap) OR (cuong tap)) doan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo chu)) xanh - hanh luan van nhung ((cong tap) OR (cuong tap)) doan tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chu)) xanh - hanh luan van nhung ((cong tap) OR (cuong tap)) doan tap*.