Perhaps you should try some spelling variations:
"sobre politica publicas." » "sobre politica publica.", "sobre politica publicaciones.", "sobre politica publicaas.", "sobre politico publicoas.", "sobre politicas publicadas.", "sobre politicas publicas."
"elite politica public." » "elite politica publica.", "elite politico publico.", "elite politicas publicad.", "elites politicas public.", "etica politica public.", "entre politica public."
"serie politicas publicas." » "serie policiaca publicas."

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sobre politica publicas.\") OR (\"elite politica public.\"))) OR (\"serie politicas publicas.\"))~".
• Removing quotes may allow a broader search: (((( sobre politica publicas. ) OR ( elite politica public. ))) OR ( serie politicas publicas. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sobre politica publicas.") OR ("elite politica public."))) OR ("serie politicas publicas."))*.