Perhaps you should try some spelling variations:
"estudios americanos los." » "estudios latinoamericanos los.", "estudios americanos la.", "estudios americanos o.", "estudios americas los."
"estudio linguistico desde." » "estudio linguistica desde.", "estudio linguisticas desde.", "estudio linguistico de."
"estudios las especies." » "estudio las especies.", "estudios mas especies.", "estudios a especies.", "estudios de especies."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("estudios americanos los.") or ("estudio linguistico desde."))) or ("estudios las especies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios americanos los.") OR ("estudio linguistico desde."))) OR ("estudios las especies.")).
• Removing quotes may allow a broader search: (((( estudios americanos los. ) or ( estudio linguistico desde. ))) or ( estudios las especies. )).
• Adding a wildcard symbol may retrieve word variants: (((("estudios americanos los.") or ("estudio linguistico desde."))) or ("estudios las especies."))*.