Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politicas publicas.", "sobre politica publica.", "sobre politica publicaciones."
"serie politicas pabloas." » "serie politicas pablo.", "serie politicas publicas.", "serie politica pablo.", "serie policiaca pabloas."
"elite politico public." » "elite politico publico.", "elite politica publica.", "elite politico julia.", "elite politica public.", "delito politico public.", "elites politicas 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 publicas.") OR ("elite politico public."))) OR ("serie politicas pabloas."))~.
• Removing quotes may allow a broader search: (((( sobre politica publicas. ) or ( elite politico public. ))) or ( serie politicas pabloas. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica publicas.") or ("elite politico public."))) or ("serie politicas pabloas."))*.