Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
tran van » luan van
cong tap » cuong tap, cong tac, cong tan
tap doan » tap quan
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 tran van nhung cong tap doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chu)) xanh - hanh tran van nhung cong tap doan tap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chu)) xanh - hanh tran van nhung cong tap doan tap*.