Perhaps you should try some spelling variations:
"series estudioss peruanos." » "series estudios peruanos.", "seis estudios peruanos.", "serie estudos peruanos."
"serie estudio cubanos." » "serie estudio urbano.", "series estudios cubanos.", "serie studia cubanos.", "serie estado cubanos."
"serie estudios urbanos." » "series estudioss urbanos.", "serie studias urbanos.", "serie estados 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: (((("serie estudio cubanos.") or ("series estudioss peruanos."))) or ("serie estudios urbanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie estudio cubanos.") OR ("series estudioss peruanos."))) OR ("serie estudios urbanos.")).
• Removing quotes may allow a broader search: (((( serie estudio cubanos. ) or ( series estudioss peruanos. ))) or ( serie estudios urbanos. )).
• Adding a wildcard symbol may retrieve word variants: (((("serie estudio cubanos.") or ("series estudioss peruanos."))) or ("serie estudios urbanos."))*.