Perhaps you should try some spelling variations:
"serie policiaca publica." » "serie politica publicas.", "serie politicas publicas.", "serie politicas publicad."
"sobre politica publica." » "sobre politicas publicas.", "sobre politica publicasa.", "sobre politico publicoa.", "sobre politicas publicasa.", "sobre politicas publica."
"serie politica public." » "serie politica publicas.", "serie politico publico.", "serie politicas publicas.", "serie politicas public.", "elite politica public."

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