Perhaps you should try some spelling variations:
"spring services business model" » "spring prices business model", "spring services using model", "sharing services business model", "caring services business model", "springs service business model", "spring services business models"
"springer service business model" » "springer serie business model", "springs service business model", "springer series business model", "springer service using model", "springer service business models"
"stronger science business model" » "springer science business model", "stronger evidence business model", "stronger stance business model", "stronger finance business model", "stronger science using model", "stronger science 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: (((("springer service business model") OR ("spring services business model"))) OR ("stronger science business model")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"springer service business model\") OR (\"spring services business model\"))) or (\"stronger science business model\"))".
• Removing quotes may allow a broader search: (((( springer service business model ) OR ( spring services business model ))) or ( stronger science business model )).
• Adding a wildcard symbol may retrieve word variants: (((("springer service business model") OR ("spring services business model"))) or ("stronger science business model"))*.