Perhaps you should try some spelling variations:
"river science business model" » "river finance business model", "river service business model", "river science using model", "driven science business model", "laser science business model", "cyber science business model"
"springer springe business models" » "spring spring business models", "springer spaniel business models", "springer bridge business models", "springer price business models", "springer single business models"
"springer series business models" » "springer services business models", "springer serious business models", "springer server business models"

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: (("river science business model") OR ((("springer springe business models") OR ("springer series business models")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"river science business model\") or (((\"springer springe business models\") OR (\"springer series business models\"))))".
• Removing quotes may allow a broader search: (( river science business model ) or ((( springer springe business models ) OR ( springer series business models )))).
• Adding a wildcard symbol may retrieve word variants: (("river science business model") or ((("springer springe business models") OR ("springer series business models"))))*.