Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios americanos.", "serie estudios ensayos.", "serie estudios cervantinos."
"series d'estudis urbans." » "serie estudio urbans.", "serie estudos urbans.", "series estudio urbano.", "series estudios urbano."
"series estudios urbanos." » "seis estudios urbanos.", "tres estudios urbanos.", "leyes estudios urbanos."

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