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