Perhaps you should try some spelling variations:
"series estudios peruanoss." » "series estudios peruanos.", "series estudios urbanos.", "serie estudios peruanoss.", "seis estudios peruanoss.", "tres estudios peruanoss."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"serret estudios hispano." » "serie estudios hispano.", "secretos estudios hispano.", "barreto estudios hispano.", "serret estudios hispana.", "serret estudios hispanic."

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