Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
cach thoi » cac thoi, cach thuc, cach noi
cong cong » cong dong, trong cong, dung cong
cac khu » cac khoi, cac kieu
cac thu » cach thuc, cac thoi
te cong » tai cong, thi cong, thu cong
ban ve » ban va
ve y » ve ky, ve _, ke y

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: quyen tai ((((cac khu) OR (cach thoi))) OR (cac thu)) đe co ban ve y te cong cong~.
• Adding a wildcard symbol may retrieve word variants: quyen tai ((((cac khu) or (cach thoi))) or (cac thu)) đe co ban ve y te cong cong*.