Perhaps you should try some spelling variations:
"dos studies hispanic." » "dos estudios hispanicos.", "dos estudios hispano.", "dos studies spain.", "dos estudios hispanic.", "case studies hispanic."
"serie estudios urbans." » "serie estudios urbanos.", "serie estudios urbano.", "serie d'estudis urbans.", "series estudioss urbans.", "serie studias urbans.", "serie estados urbans."
"serie estudio urbano." » "serie estudios urbano.", "serie estudios urbanos.", "serie espacio urbano.", "series estudios urbano.", "serie studia urbano.", "serie estado urbano."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("serie estudios urbans.") or ("serie estudio urbano."))) or ("dos studies hispanic."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie estudios urbans.") OR ("serie estudio urbano."))) OR ("dos studies hispanic."))*.
• Removing quotes may allow a broader search: (((( serie estudios urbans. ) or ( serie estudio urbano. ))) or ( dos studies hispanic. ))*.