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

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 politico publico.") OR ("series political publico."))) or ("sobre politica publicas."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie politico publico.") OR ("series political publico."))) OR ("sobre politica publicas.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"serie politico publico.\") OR (\"series political publico.\"))) or (\"sobre politica publicas.\"))".
• Removing quotes may allow a broader search: (((( serie politico publico. ) OR ( series political publico. ))) or ( sobre politica publicas. )).
• Adding a wildcard symbol may retrieve word variants: (((("serie politico publico.") OR ("series political publico."))) or ("sobre politica publicas."))*.