Perhaps you should try some spelling variations:
springer springe » spring spring
stronger science » springer science, stronger evidence, astronomy science
stronger stance » stronger state, stronger cancer, stronger starts
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 (springer series))) OR (river science))) OR (((stronger science) OR (stronger stance)))) ((business mit) OR (business model)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((springer springe) OR (springer series))) or (river science))) or (((stronger science) or (stronger stance)))) ((business mit) or (business model))".
• Adding a wildcard symbol may retrieve word variants: ((((((springer springe) OR (springer series))) or (river science))) or (((stronger science) or (stronger stance)))) ((business mit) or (business model))*.