Perhaps you should try some spelling variations:
"springer science business model" » "stronger science business model", "spring resilience business model", "river science business model", "springer finance business model", "springer service business model", "springer science using model"
"springer science business models" » "stronger science business models", "spring resilience business models", "river science business models", "springer finance business models", "springer service business models", "springer science using models"
"hardanger bridge business model" » "adapter bridge business model", "hardanger bring business model", "hardanger bridging business model", "hardanger edge business model"
"stringer bridge business model" » "schrodinger bridge business model", "bettinger bridget business model", "stringer bring business model", "stringer bridging business model", "stringer edge business model"

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