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