Perhaps you should try some spelling variations:
"spoken world" » "spoken words", "broken world", "open world"
"spoken works" » "spoken words", "unspoken words", "spoken corpus"
"spoken word" » "spoken words", "spoken work", "spoken wird"

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: (((("spoken word") OR ("spoken world"))) OR ("spoken works")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"spoken word\") OR (\"spoken world\"))) or (\"spoken works\"))".
• Removing quotes may allow a broader search: (((( spoken word ) OR ( spoken world ))) or ( spoken works )).
• Adding a wildcard symbol may retrieve word variants: (((("spoken word") OR ("spoken world"))) or ("spoken works"))*.