Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politicas publicas.", "sobre politica publicaciones.", "sobre politicas publicass."
"publica politica publica." » "public policy publica.", "publica politicas publicas."
"serie politicas public." » "serie politicas publicas.", "serie politicas publicad.", "serie politicas pablo.", "serie policiaca 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: (("publica politica publica.") or ((("sobre politica publicas.") or ("serie politicas public."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("publica politica publica.") OR ((("sobre politica publicas.") OR ("serie politicas public.")))).
• Removing quotes may allow a broader search: (( publica politica publica. ) or ((( sobre politica publicas. ) or ( serie politicas public. )))).
• Adding a wildcard symbol may retrieve word variants: (("publica politica publica.") or ((("sobre politica publicas.") or ("serie politicas public."))))*.