Perhaps you should try some spelling variations:
thieu nganh » hieu nganh, trien nganh, nghiep nganh
cong cong » cong dong, trong cong, dung cong
dang cong » dung cong
van nang » van quang, van ban, van dong
nang dua » nang du, nang suat, nang quan
dang van » hoang van, hang va
van ca » van cau, van cua, dan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu nganh - van nang dua ((cong cong) or (dang cong)) dang van ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu nganh - van nang dua ((cong cong) OR (dang cong)) dang van ca*.