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

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