Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politica publica.", "sobre politica publicaciones.", "sobre politicas publicas."
"ser criticos publica." » "ser criticos republica.", "sus criticos publica.", "de criticos publica.", "der criticism publica."
"serie politicas publicas." » "serie policiaca publicas."

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 politicas publicas.") OR ("sobre politica publicas."))) OR ("ser criticos publica."))~.
• Removing quotes may allow a broader search: (((( serie politicas publicas. ) or ( sobre politica publicas. ))) or ( ser criticos publica. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("serie politicas publicas.") or ("sobre politica publicas."))) or ("ser criticos publica."))*.