Perhaps you should try some spelling variations:
"slaves political publicas." » "slaves politicas publicas.", "slaves politica publicas.", "slaves politicas publicad.", "claves politicas publicas.", "class political publicas.", "blacks political publicas."
"serie politicas publica." » "serie politicas publicas.", "serie politicas publicad.", "serie politica publicas.", "serie policiaca publica."
"sobre politica publica." » "sobre politicas publicas.", "sobre politicas publica."

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