Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » diep tinh, bien tinh
san thanh » ban thanh, van thanh, son thanh
thanh cac » hanh cac, thanh bac, thanh ca
tram van » tam van, trang van, tranh van
tran van » luan van
cong san » cong tac

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: ho ((trieu tinh) OR (lieu tinh)) - hanh ((tram van) OR (tran van)) nhung cong san thanh cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((trieu tinh) or (lieu tinh)) - hanh ((tram van) OR (tran van)) nhung cong san thanh cac~".
• Adding a wildcard symbol may retrieve word variants: ho ((trieu tinh) or (lieu tinh)) - hanh ((tram van) OR (tran van)) nhung cong san thanh cac*.