Perhaps you should try some spelling variations:
quyen con » quyen cong, tuyen chon, nguyen con
cong cong » cong dong, trong cong, dung cong
con cac » chon cac, cong cac, co cac
cac chu » cac thu, cac che, cac khu
te cong » tai cong, thi cong, thu cong
ve y » ve ky, te y
ve _ » va _
ke y » ke ky, ke o

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

• Performing a fuzzy search may retrieve terms with similar spellings: quyen con cac chu đe co ban ((((ve y) or (ve _))) or (ke y)) te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen con cac chu đe co ban ((((ve y) OR (ve _))) OR (ke y)) te cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen con cac chu đe co ban ((((ve y) or (ve _))) or (ke y)) te cong cong*.