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