Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios americanos.", "serie estudios ensayos.", "serie estudios cervantinos."
"series estudios cubanos." » "series estudios urbano.", "series estudios lesbianos.", "series estudios ensayos.", "seis estudios cubanos.", "tres estudios cubanos.", "leyes estudios cubanos."
"serie estudios urbanos." » "serie estudios urbano."

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: (((("series estudios cubanos.") or ("serie estudios peruanos."))) or ("serie estudios urbanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios cubanos.") OR ("serie estudios peruanos."))) OR ("serie estudios urbanos.")).
• Removing quotes may allow a broader search: (((( series estudios cubanos. ) or ( serie estudios peruanos. ))) or ( serie estudios urbanos. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudios cubanos.") or ("serie estudios peruanos."))) or ("serie estudios urbanos."))*.