Perhaps you should try some spelling variations:
"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 drive business model", "springer bridge business models"
"river science using model" » "driven science using model", "laser science using model", "cyber science using model", "river science ising model"
"river science using mobile" » "driven science using mobile", "laser science using mobile", "cyber science using mobile"

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