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

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

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