Perhaps you should try some spelling variations:
"serie policiacas publicas." » "serie politicas publicas.", "serie politicas publicad.", "serie politica publica.", "serie policiaca publicas.", "series politicas publicas."
"serie politica publicas." » "serie politicas publicas.", "serie politica publica.", "serie politica publicaciones.", "serie policiaca publicas.", "sobre politica publicas."
"sobre politicas paz." » "sobre politica paz.", "serie politicas paz.", "sobre politicas para.", "sobre politicas de.", "sobre politicas en."

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 politica publicas.") or ("sobre politicas paz."))) or ("serie policiacas publicas."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie politica publicas.") OR ("sobre politicas paz."))) OR ("serie policiacas publicas.")).
• Removing quotes may allow a broader search: (((( serie politica publicas. ) or ( sobre politicas paz. ))) or ( serie policiacas publicas. )).
• Adding a wildcard symbol may retrieve word variants: (((("serie politica publicas.") or ("sobre politicas paz."))) or ("serie policiacas publicas."))*.