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

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

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