Perhaps you should try some spelling variations:
vien thanh » viet thanh, tien thanh, dien thanh
thanh tran » thanh trang, thanh toan, thanh tra
nhung cong » dung cong, thong cong, hang cong
hiem ngan » viem gan
van nhung » van nhuong, va nhung, van hung
kim ngan » kim ngoc
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((vien thanh) OR (((hiem ngan) OR (kim ngan)))) - thanh tran van nhung cong dan than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((vien thanh) or (((hiem ngan) OR (kim ngan)))) - thanh tran van nhung cong dan than cap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((vien thanh) or (((hiem ngan) OR (kim ngan)))) - thanh tran van nhung cong dan than cap*.