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