Perhaps you should try some spelling variations:
"serie politicas publicad." » "serie politicas publicas.", "serie politica publica.", "serie politica publicas.", "serie policiaca publicad."
"lideres politicos publica." » "limites politicos publica.", "actores politicos publica.", "lideres politicos republica.", "lideres politicas publicas.", "lideres politica publica."
"sobre politica pablo." » "sobre politicas pablo.", "sobre politica para.", "sobre colica pablo.", "sobre politica al."

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