Perhaps you should try some spelling variations:
"lideres politicos luis." » "limites politicos luis.", "actores politicos luis.", "lideres politico luis.", "lideres politicos las.", "lideres politica luis."
"serie politica publica." » "serie politicas publicas.", "serie politicas publica.", "serie policiaca publica.", "sobre politica publica."
"ideas politicas luis." » "las politicas luis.", "ideologias politicas luis.", "ideas politica luis.", "ideas politico luis.", "ideas politicas las."

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: (((("ideas politicas luis.") OR ("lideres politicos luis."))) OR ("serie politica publica."))~.
• Removing quotes may allow a broader search: (((( ideas politicas luis. ) or ( lideres politicos luis. ))) or ( serie politica publica. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("ideas politicas luis.") or ("lideres politicos luis."))) or ("serie politica publica."))*.