Perhaps you should try some spelling variations:
"sobre politicas publica." » "sobre politicas publicas.", "sobre politicas publicad.", "sobre politica publicas.", "sobre politica publica."
"serie politicas publica." » "serie politicas publicas.", "serie politicas publicad.", "serie politica publicas.", "serie policiaca publica."
"entre politica publica." » "entre politicas publicas.", "sobre politica publica."

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: (("entre politica publica.") or ((("sobre politicas publica.") OR ("serie politicas publica."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("entre politica publica.") OR ((("sobre politicas publica.") OR ("serie politicas publica.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"entre politica publica.\") or (((\"sobre politicas publica.\") OR (\"serie politicas publica.\"))))".
• Removing quotes may allow a broader search: (( entre politica publica. ) or ((( sobre politicas publica. ) OR ( serie politicas publica. )))).
• Adding a wildcard symbol may retrieve word variants: (("entre politica publica.") or ((("sobre politicas publica.") OR ("serie politicas publica."))))*.