Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dang cong
quyen con » quyen cong, tuyen chon, nguyen con
dung cong » dung trong
con cac » chon cac, cong cac, co cac
cac khu » cac thu, cac khoi, cac kieu
ban ve » ban va
o thu » o thua, ho thu, do thu
ve o » ve co, ve do, ve so

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 khu đe co ban ve o thu ((cong cong) or (dung cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen con cac khu đe co ban ve o thu ((cong cong) OR (dung cong)).
• Adding a wildcard symbol may retrieve word variants: quyen con cac khu đe co ban ve o thu ((cong cong) or (dung cong))*.