Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politicas publicas.", "sobre politica publicaciones.", "sobre politicas publicass."
"serie politica publica." » "serie politicas publicas.", "serie politicas publica.", "serie policiaca publica.", "elite politica publica."
"etica politica pablo." » "publica politica pablo.", "etica politica para.", "etica colica pablo.", "etica politica al."

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