Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politicas publicas.", "sobre politica publicaciones.", "sobre politicas publicass."
"limites politicos public." » "lideres politicos public.", "debates politicos public.", "limites juridicos public.", "limites politico publico.", "limites politicos republica.", "limites politicas publicas."
"serie politica publica." » "serie politicas publicas.", "serie politicas publica.", "serie policiaca publica.", "elite politica publica."

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: (((("sobre politica publicas.") OR ("limites politicos public."))) OR ("serie politica publica."))~.
• Removing quotes may allow a broader search: (((( sobre politica publicas. ) or ( limites politicos public. ))) or ( serie politica publica. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica publicas.") or ("limites politicos public."))) or ("serie politica publica."))*.