Perhaps you should try some spelling variations:
"los estudios urbano." » "los estudios urbanos.", "los estudios peruanos.", "los estudios hispano."
"serie estudio urbano." » "serie estudios urbanos.", "serie espacio urbano.", "serie estudios urbano.", "series estudios urbano.", "serie studia urbano."
"strikes spain urbano." » "strike spain urbano.", "shrines spain urbano.", "series spain urbano.", "strikes espacio urbano.", "strikes spain durango.", "strikes motin 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: (((("strikes spain urbano.") or ("serie estudio urbano."))) or ("los estudios urbano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("strikes spain urbano.") OR ("serie estudio urbano."))) OR ("los estudios urbano.")).
• Removing quotes may allow a broader search: (((( strikes spain urbano. ) or ( serie estudio urbano. ))) or ( los estudios urbano. )).
• Adding a wildcard symbol may retrieve word variants: (((("strikes spain urbano.") or ("serie estudio urbano."))) or ("los estudios urbano."))*.