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

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