Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
nhung don » nhung van, nhung bo
chua nang » chuc nang, chua xang, kha nang
nang cong » nang song, dang cong, bang cong
don chua » con chua, don chuc, doan chuan
tan van » tran van, tang van, dang van
luan » quan, lan

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 xanh - nhung don chua nang cong ((tan van) or (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - nhung don chua nang cong ((tan van) OR (luan van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - nhung don chua nang cong ((tan van) or (luan van)) ban*.