Perhaps you should try some spelling variations:
medical radiological » chemical radiological, medicine radiological, medical biological
medico sociological » medical sociological, medico psychological, micro sociological
medico biological » mexico biological, medical biological, medicine 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 radiological) OR (((medico sociological) OR (medico biological)))) association.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((medical radiological) or (((medico sociological) OR (medico biological)))) association".
• Adding a wildcard symbol may retrieve word variants: ((medical radiological) or (((medico sociological) OR (medico biological)))) association*.