Perhaps you should try some spelling variations:
"etudes de 21st international" » "etudes de first international", "etudes de 2first international", "etudes age 21st international"
"etudes des 1st international" » "etudes des first international", "etude des 1st international", "etude de 1st international", "etudes en 1st international"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("etudes de 21st international") OR ("etudes des 1st international")).
• Removing quotes may allow a broader search: (( etudes de 21st international ) or ( etudes des 1st international )).
• Adding a wildcard symbol may retrieve word variants: (("etudes de 21st international") or ("etudes des 1st international"))*.