Perhaps you should try some spelling variations:
"estudios peruanos desde." » "estudios americanos desde.", "estudios ensayos desde.", "estudios cervantinos desde.", "estudios peruanos de.", "estudios peruanos del.", "estudios peruanos jose."
"estudios humanas serie." » "estudios mas serie.", "estudios humanidades serie."
"estudios urbanos serie." » "estudios humanos serie."

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

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