Perhaps you should try some spelling variations:
springer springe » spring spring, springer series, springer spaniel
stronger science » springer science, stronger evidence, stronger stance
stronger state » stronger stance, stronger starts, strong state
business model » business models
river science » driven science, laser science, cyber science
business mit » business men, business man

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: ((((springer springe) OR (river science))) OR (((stronger science) OR (stronger state)))) ((business mit) OR (business model)).
• Adding a wildcard symbol may retrieve word variants: ((((springer springe) or (river science))) or (((stronger science) or (stronger state)))) ((business mit) or (business model))*.