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

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