Perhaps you should try some spelling variations:
quyen cap » quyen cach, huyen cao, quyen cua
quyen con » quyen cong, tuyen chon, nguyen con
cong cong » cong dong, trong cong, dung cong
cac khoi » cac thoi, cac khoan, cach thoi
cac chu » cac thu, cac che, cac khu
te cong » tai cong, thi cong, thu cong
vat y » vat ly, vat _
va y » va ky, va my, va ly

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((quyen cap) or (quyen con)) ((cac chu) or (cac khoi)) đe co ban ((va y) OR (vat y)) te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen cap) OR (quyen con)) ((cac chu) OR (cac khoi)) đe co ban ((va y) OR (vat y)) te cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen cap) or (quyen con)) ((cac chu) or (cac khoi)) đe co ban ((va y) OR (vat y)) te cong cong".
• Adding a wildcard symbol may retrieve word variants: ((quyen cap) or (quyen con)) ((cac chu) or (cac khoi)) đe co ban ((va y) OR (vat y)) te cong cong*.