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

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