Perhaps you should try some spelling variations:
"slaves political publico." » "slaves politicas publicas.", "slaves politicas publicad.", "slaves politica publicas.", "claves politicas publico.", "class political publico.", "blacks political publico."
"serie politico publico." » "serie politica publicas.", "serie politico republicano.", "serie politicos republica.", "serie politica publico.", "serie politicas publico.", "series political publico."
"sobre politica publica." » "sobre politicas publicas.", "sobre politicas publica."

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 politico publico."))) or ("sobre politica publica."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("slaves political publico.") OR ("serie politico publico."))) OR ("sobre politica publica."))*.
• Removing quotes may allow a broader search: (((( slaves political publico. ) or ( serie politico publico. ))) or ( sobre politica publica. ))*.