Perhaps you should try some spelling variations:
astronomy science » astronomy space
springer science » stronger science, springer springe, dinner science
bigger science » big science, better science, border science
business model » business models
river science » driven science, laser science, cyber science

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 science) OR (((bigger science) OR (river science))))) OR (((astronomy science) OR (astronomy ancient)))) business model.
• Adding a wildcard symbol may retrieve word variants: ((((springer science) or (((bigger science) or (river science))))) or (((astronomy science) or (astronomy ancient)))) business model*.