Perhaps you should try some spelling variations:
thanh trung » thanh tung
bien tinh » bi tinh, yen tinh, diep tinh
cong sang » cong lang, cong bang, cong tang
cong vang » cong lang, cong quang, cong ngang
trung ap » trung cap, trung lap, trung tam
cong san » cong tac
toan ban » van ban
ho bien » pho bien, hoa bien, so bien
ap dung » xay dung, van dung

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 bien tinh - thanh trung ap dung ((cong san) OR (((cong sang) OR (cong vang)))) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho bien tinh - thanh trung ap dung ((cong san) or (((cong sang) OR (cong vang)))) toan ban~".
• Adding a wildcard symbol may retrieve word variants: ho bien tinh - thanh trung ap dung ((cong san) or (((cong sang) OR (cong vang)))) toan ban*.