Perhaps you should try some spelling variations:
"slaves political publico." » "slaves politico publico.", "slaves politicas publicas.", "slaves politicas publicad.", "claves politicas publico.", "class political publico.", "blacks political publico."
"serie policiaca publico." » "serie politico publico.", "serie politica publicas.", "serie oficial publico."
"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: (((("slaves political publico.") or ("serie policiaca publico."))) or ("sobre politica publica."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("slaves political publico.") OR ("serie policiaca publico."))) OR ("sobre politica publica.")).
• Removing quotes may allow a broader search: (((( slaves political publico. ) or ( serie policiaca publico. ))) or ( sobre politica publica. )).
• Adding a wildcard symbol may retrieve word variants: (((("slaves political publico.") or ("serie policiaca publico."))) or ("sobre politica publica."))*.