Perhaps you should try some spelling variations:
"serie d'estudis urbans." » "serie estudios urbano.", "serie estudios urbans.", "serie estudio urbans.", "serie estudos urbans."
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos.", "serie estudioss urbanos.", "senales estudios urbanos."
"series estudio urbano." » "serie estudio urbano.", "serie estudios urbano.", "senales estudio urbano.", "series estudios urbano.", "series espacio 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: (((("series estudio urbano.") or ("series estudios urbanos."))) or ("serie d'estudis urbans."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudio urbano.") OR ("series estudios urbanos."))) OR ("serie d'estudis urbans.")).
• Removing quotes may allow a broader search: (((( series estudio urbano. ) or ( series estudios urbanos. ))) or ( serie d'estudis urbans. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudio urbano.") or ("series estudios urbanos."))) or ("serie d'estudis urbans."))*.