Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
quyen cap » quyen cach, huyen cao, quyen con
cap cac » ca cac, cap sac, tap cac
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 cac chu 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 cac chu đe co ban ((va y) OR (vat y)) te cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen cap cac chu đe co ban ((va y) or (vat y)) te cong cong*.