Perhaps you should try some spelling variations:
medical sociological » medico sociological, medical psychological, medical sociologist
medical radiological » chemical radiological, medicine radiological, clinical radiological
medical biological » chemical biological, physical biological, classical biological

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: ((((medical sociological) OR (medical radiological))) OR (medical biological)) association.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((medical sociological) OR (medical radiological))) or (medical biological)) association".
• Adding a wildcard symbol may retrieve word variants: ((((medical sociological) OR (medical radiological))) or (medical biological)) association*.