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

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