Perhaps you should try some spelling variations:
espinosa de » espinosa a (Expand Search), espinosa jm (Expand Search), espinosa leal (Expand Search)
espinosa _ » espinosa a (Expand Search), espinosa jm (Expand Search), espinoza m (Expand Search)
espinosa f » espinosa a (Expand Search), espinosa jm (Expand Search), espinoza m (Expand Search)
federations » federation (Expand Search), generations (Expand Search)
sociologist » sociologists (Expand Search), sociological (Expand Search), psychologist (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: federations ((espinosa de) OR (((espinosa _) OR (espinosa f)))) sociologist~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "federations ((espinosa de) OR (((espinosa _) OR (espinosa f)))) sociologist".
• Adding a wildcard symbol may retrieve word variants: federations ((espinosa de) OR (((espinosa _) OR (espinosa f)))) sociologist*.