Perhaps you should try some spelling variations:
"estudis care conflictss sociales" » "estudis care conflictos sociales", "estudis care conflict social", "estudis care conflicto social", "estudis care conflict sociales", "estudis carers conflicts sociales", "estudis core conflict sociales", "estudis care conflicts sociales", "estudis carers conflictss sociales", "estudis scale conflictss sociales", "estudis de conflictss sociales", "estudio para conflictss sociales"
"estudis care conflicts special" » "estudis care conflict social", "estudis care conflicto social", "estudis care contacts special", "estudis care conflict special", "estudis carers conflicts special", "estudis scale conflicts special", "estudis de conflicts special", "estudio para conflicts special"
"estudis care conflicts social" » "estudis care conflict social", "estudis care conflicto social", "estudis care conflictos sociales", "estudis carers conflicts social", "estudis scale conflicts social", "estudis de conflicts social", "estudio para conflicts social"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("estudis care conflictss sociales") OR ((("estudis care conflicts social") OR ("estudis care conflicts special")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"estudis care conflictss sociales\") or (((\"estudis care conflicts social\") OR (\"estudis care conflicts special\"))))".
• Removing quotes may allow a broader search: (( estudis care conflictss sociales ) or ((( estudis care conflicts social ) OR ( estudis care conflicts special )))).
• Adding a wildcard symbol may retrieve word variants: (("estudis care conflictss sociales") or ((("estudis care conflicts social") OR ("estudis care conflicts special"))))*.