Perhaps you should try some spelling variations:
ethical committees » technical committees, technical committee, medical committee
ethics competence » ethics competency, ethical competence, methods competence
ethics commitee » ethics computer, ethics commitments, ethics community

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: ((((((((ethics commitee) OR (ethics competence))) OR (ethics committee))) OR (ethical committees))) OR (ethics committees)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((ethics commitee) OR (ethics competence))) or (ethics committee))) or (ethical committees))) or (ethics committees))".
• Adding a wildcard symbol may retrieve word variants: ((((((((ethics commitee) OR (ethics competence))) or (ethics committee))) or (ethical committees))) or (ethics committees))*.