Perhaps you should try some spelling variations:
"debates politicos luis." » "debate politico luis.", "debates politico luis.", "debates politicos las.", "debates politica luis."
"elites politicas luis." » "limites politicos luis.", "las politicas luis.", "ideas politicas luis.", "elites politica luis.", "elites politico luis.", "elites politicas las."
"serie politica publica." » "serie politicas publicas.", "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: (((("elites politicas luis.") OR ("debates politicos luis."))) OR ("serie politica publica."))~.
• Removing quotes may allow a broader search: (((( elites politicas luis. ) or ( debates politicos luis. ))) or ( serie politica publica. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("elites politicas luis.") or ("debates politicos luis."))) or ("serie politica publica."))*.