Perhaps you should try some spelling variations:
quyen tai » xuyen tai, nguyen tai, truyen tai
cong cong » cong dong, trong cong, dung cong
cac khoi » cac thoi, cac khoan, cach thoi
cac khu » cac kieu
cac thu » cach thuc, cac thoi
te cong » tai cong, thi cong, thu cong
ban le » ban ve
le y » le ky, le sy, ly 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 (cac khoi))) OR (cac thu)) đe co ban le y te cong cong~.
• Adding a wildcard symbol may retrieve word variants: quyen tai ((((cac khu) or (cac khoi))) or (cac thu)) đe co ban le y te cong cong*.