Perhaps you should try some spelling variations:
"series estudioss peruanos." » "series estudios peruanos.", "series estudios urbanos.", "serie estudios peruanos.", "seis estudios peruanos.", "serie estudos peruanos.", "serie estudioss peruanos.", "seis estudioss peruanos.", "tres estudioss peruanos."
"serie estudio cubanos." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios cubanos.", "serie studia cubanos.", "serie estado cubanos."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."

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