Perhaps you should try some spelling variations:
"river science business model" » "river finance business model", "driven science business model", "laser science business model", "cyber science business model"
"river service business model" » "river service using model", "rover service business model", "drivers service business model", "driven service business model"
"springer science using model" » "stronger science using model", "spring resilience using model", "bigger science using model", "springer science ising model", "springer science using mobile"
"springer springe business models" » "spring spring business models", "springer series business models", "springer spaniel business models", "springer bridge business models", "springer price business models", "springer single 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 ("river service business model"))) OR ("springer science using model"))) OR ("springer springe business models")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"river science business model\") OR (\"river service business model\"))) or (\"springer science using model\"))) or (\"springer springe business models\"))".
• Removing quotes may allow a broader search: (((((( river science business model ) OR ( river service business model ))) or ( springer science using model ))) or ( springer springe business models )).
• Adding a wildcard symbol may retrieve word variants: (((((("river science business model") OR ("river service business model"))) or ("springer science using model"))) or ("springer springe business models"))*.