Perhaps you should try some spelling variations:
"serie politicas publicad." » "serie politicas publicas.", "serie politica publica.", "serie politica publicas.", "serie politicas publicasad.", "serie politica publicaad.", "serie politica publicasad.", "serie policiaca publicad."
"sobre politica publicaa." » "sobre politica publica.", "sobre politica publicas.", "sobre politicas publicas.", "sobre politicas publicaa."
"serie politicas public." » "serie politicas publicas.", "serie politica publica.", "serie politica publicas.", "serie policiaca 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: (("sobre politica publicaa.") OR ((("serie politicas public.") OR ("serie politicas publicad."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sobre politica publicaa.\") or (((\"serie politicas public.\") OR (\"serie politicas publicad.\"))))~".
• Removing quotes may allow a broader search: (( sobre politica publicaa. ) or ((( serie politicas public. ) OR ( serie politicas publicad. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("sobre politica publicaa.") or ((("serie politicas public.") OR ("serie politicas publicad."))))*.