Perhaps you should try some spelling variations:
medical activities » technical activities, physical activities, critical activities
social activities » social activity, social activism, commercial activities
final activities » fiscal activities, fungal activities, vital activities

Try widening your search to All Fields.

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: %((((social activities) OR (final activities))) OR (medical activities))%22.
• Adding a wildcard symbol may retrieve word variants: %((((social activities) or (final activities))) or (medical activities))%22*.