Perhaps you should try some spelling variations:
"serie policiacas public." » "serie politicas publicad.", "serie politica publica.", "serie policiaca public.", "serie politicas public.", "serie politica public."
"sobre politicas public." » "sobre politicas publicad.", "sobre politica publica.", "sobre politica publicas.", "sobre politica public.", "serie politicas public."
"sobre politicas publicas." » "sobre politicas publicadas.", "sobre politica publicaas.", "sobre politica publicasas.", "sobre politica publicas.", "serie politicas publicas.", "sobre politicas publica.", "sobre politicas publico."

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