Perhaps you should try some spelling variations:
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
nhung cong » dung cong, thong cong, hang cong
hoang van » hang va
trong van » trong cac
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan tap » phan lap, han tap, pha tap

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 nganh) OR (vien nganh)) - hanh ((hoang van) or (trong van)) nhung cong dan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (vien nganh)) - hanh ((hoang van) OR (trong van)) nhung cong dan phan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) OR (vien nganh)) - hanh ((hoang van) or (trong van)) nhung cong dan phan tap*".