Perhaps you should try some spelling variations:
"estudios linguisticos desde." » "estudio linguistico desde.", "estudio sociolinguistico desde.", "estudios linguisticas desde.", "estudios linguistica desde.", "estudios linguisticos del."
"estudios peruanos serie." » "estudios urbanos serie.", "estudios americanos serie.", "estudios ensayos serie.", "estudios verano serie."
"estudios mayo serie." » "estudios maior serie.", "estudios mas serie.", "estudios enzo 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 peruanos serie.") or ("estudios linguisticos desde."))) or ("estudios mayo serie."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios peruanos serie.") OR ("estudios linguisticos desde."))) OR ("estudios mayo serie.")).
• Removing quotes may allow a broader search: (((( estudios peruanos serie. ) or ( estudios linguisticos desde. ))) or ( estudios mayo serie. )).
• Adding a wildcard symbol may retrieve word variants: (((("estudios peruanos serie.") or ("estudios linguisticos desde."))) or ("estudios mayo serie."))*.