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