Perhaps you should try some spelling variations:
"springer single business models" » "springer springe business models", "springer eine business models", "springer science business models", "springer simple business models", "springer wrangle business models", "springer using business models"
"springer silke business models" » "springer like business models", "runger silke business models", "springer bill business models", "springer silos business models", "springer spike business models"
"river finance business model" » "driven finance business model", "river france business model", "einer finance 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: (("river finance business model") OR ((("springer single business models") OR ("springer silke business models")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"river finance business model\") or (((\"springer single business models\") OR (\"springer silke business models\"))))".
• Removing quotes may allow a broader search: (( river finance business model ) or ((( springer single business models ) OR ( springer silke business models )))).
• Adding a wildcard symbol may retrieve word variants: (("river finance business model") or ((("springer single business models") OR ("springer silke business models"))))*.