Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politicas publicas.", "sobre politica publicaciones.", "sobre politicas publicass."
"crises politica publica." » "crises politicas publicas.", "crises political publica.", "crisis politica publica.", "crisis politicas publica."
"serie politica publico." » "serie politico publico.", "serie politicas publicas.", "serie politicas publicad.", "serie politicas publico.", "serie policiaca publico.", "elite politica publico."

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: (((("crises politica publica.") or ("serie politica publico."))) or ("sobre politica publicas."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("crises politica publica.") OR ("serie politica publico."))) OR ("sobre politica publicas.")).
• Removing quotes may allow a broader search: (((( crises politica publica. ) or ( serie politica publico. ))) or ( sobre politica publicas. )).
• Adding a wildcard symbol may retrieve word variants: (((("crises politica publica.") or ("serie politica publico."))) or ("sobre politica publicas."))*.