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

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