Perhaps you should try some spelling variations:
"serie policiaca publica." » "serie politica publicas.", "serie politicas publicas.", "serie politicas publicad."
"publica politica publica." » "public policy publica.", "publica politicas publicas."
"etica politicas public." » "etica politicas publicas.", "etica politicas publicad.", "etica politica publicas.", "etica politica public.", "etico politicas public.", "etico politicos public."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("serie policiaca publica.") or ((("publica politica publica.") or ("etica politicas public."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie policiaca publica.") OR ((("publica politica publica.") OR ("etica politicas public.")))).
• Removing quotes may allow a broader search: (( serie policiaca publica. ) or ((( publica politica publica. ) or ( etica politicas public. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie policiaca publica.") or ((("publica politica publica.") or ("etica politicas public."))))*.