Perhaps you should try some spelling variations:
"sobre politica publico." » "sobre politico publico.", "sobre politica publicas.", "sobre politicas publicad.", "sobre politicas publico."
"etico politicas publicas." » "etico politicos publicas.", "etico politica publicas.", "mexico politicas publicas."
"serie politica publica." » "serie politicas publica.", "serie policiaca publica.", "elite 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: (((("sobre politica publico.") OR ("etico politicas publicas."))) OR ("serie politica publica."))~.
• Removing quotes may allow a broader search: (((( sobre politica publico. ) or ( etico politicas publicas. ))) or ( serie politica publica. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica publico.") or ("etico politicas publicas."))) or ("serie politica publica."))*.