Perhaps you should try some spelling variations:
"sobre politicas public." » "sobre politicas publicad.", "sobre politica publica.", "sobre politica publicas.", "sobre politica public."
"serie politicas publicas." » "serie politicas publicadas.", "serie politica publicaas.", "serie politica publicasas.", "serie policiaca publicas."
"elite politicas pablo." » "elites politicas pablo.", "elite politica pablo.", "elite politico pablo.", "elite politicas para.", "elite politicas paz."

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