Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios urbanos.", "serie estudios americanos.", "serie estudios ensayos."
"series estudioss hispano." » "series estudios hispano.", "series estudios hispanicos.", "series espacios hispano.", "seis estudios hispano.", "serie estudio hispano.", "serie estudos hispano.", "seis estudioss hispano.", "tres estudioss hispano.", "leyes estudioss hispano."
"series estudios urbano." » "seis estudios urbano.", "tres estudios urbano.", "leyes estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios hispano."

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