Perhaps you should try some spelling variations:
"river science business model" » "river service business model", "river science using model", "river science business models", "driven science business model", "laser science business model", "der science business model"
"cyber science business model" » "cyber service business model", "cyber science using model", "cyber science business models", "laser science business model", "cyber defence business model", "cyber resilience business model"
"springer finance business model" » "einer finance business model", "merger finance business model", "pardner finance business model", "springer finance business models"
"springer bridge business model" » "stringer bridge business model", "springer springe business model", "sprinkle bridge business model", "springer bring business model", "springer bridging business model", "springer edge business model", "springer bridge 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 ("cyber science business model"))) OR ("springer finance business model"))) OR ("springer bridge business model")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"river science business model\") OR (\"cyber science business model\"))) or (\"springer finance business model\"))) or (\"springer bridge business model\"))".
• Removing quotes may allow a broader search: (((((( river science business model ) OR ( cyber science business model ))) or ( springer finance business model ))) or ( springer bridge business model )).
• Adding a wildcard symbol may retrieve word variants: (((((("river science business model") OR ("cyber science business model"))) or ("springer finance business model"))) or ("springer bridge business model"))*.