Perhaps you should try some spelling variations:
"Etudes de 21st international" » "Etudes de 1st international", "Etudes age 21st international"
"etudes de first international" » "etudes die first international", "etudes ide first international", "etudes he first international"

Try widening your search to All Fields.

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 de first international")).
• Removing quotes may allow a broader search: (( Etudes de 21st international ) or ( etudes de first international )).
• Adding a wildcard symbol may retrieve word variants: (("Etudes de 21st international") or ("etudes de first international"))*.