Perhaps you should try some spelling variations:
"springer finance business models" » "einer finance business models", "merger finance business models", "specter finance business models"
"springer series business model" » "springer services business model", "springer serious business model", "springer server business model"

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: (("springer finance business models") OR ("springer series business model")).
• Removing quotes may allow a broader search: (( springer finance business models ) or ( springer series business model )).
• Adding a wildcard symbol may retrieve word variants: (("springer finance business models") or ("springer series business model"))*.