Perhaps you should try some spelling variations:
"serie d'estudis urbans." » "serie estudio urbano.", "serie estudios urbano.", "serie estudios urbans.", "serie estudio urbans.", "serie estudos urbans."
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos."
"los estudios hispano." » "los estudios hispana.", "los estudios hispanic."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("serie d'estudis urbans.") or ("series estudios urbanos."))) or ("los estudios hispano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie d'estudis urbans.") OR ("series estudios urbanos."))) OR ("los estudios hispano."))*.
• Removing quotes may allow a broader search: (((( serie d'estudis urbans. ) or ( series estudios urbanos. ))) or ( los estudios hispano. ))*.