Perhaps you should try some spelling variations:
"serie policiaca publicas." » "serie politica publicas.", "serie politicas publicas.", "serie politicas publicad."
"sobre politica publico." » "sobre politico publico.", "sobre politica publicas.", "sobre politicas publicas.", "sobre politicas publico."
"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: (((("sobre politica publico.") OR ("sobre politica publica."))) OR ("serie policiaca publicas."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sobre politica publico.\") OR (\"sobre politica publica.\"))) or (\"serie policiaca publicas.\"))~".
• Removing quotes may allow a broader search: (((( sobre politica publico. ) OR ( sobre politica publica. ))) or ( serie policiaca publicas. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica publico.") OR ("sobre politica publica."))) or ("serie policiaca publicas."))*.