Perhaps you should try some spelling variations:
"springer finance business model" » "einer finance business model", "merger finance business model", "pardner finance business model", "springer finance business models"
"springer single business model" » "springer springe business model", "springer eine business model", "springer science business model", "springer simple business model", "springer wrangle business model", "springer using business model", "springer single business models"
"springer silke business model" » "springer silke business models", "springer like business model", "runger silke business model", "springer bill business model", "springer silos business model", "springer spike 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 finance business model") OR ((("springer single business model") OR ("springer silke business model")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"springer finance business model\") or (((\"springer single business model\") OR (\"springer silke business model\"))))".
• Removing quotes may allow a broader search: (( springer finance business model ) or ((( springer single business model ) OR ( springer silke business model )))).
• Adding a wildcard symbol may retrieve word variants: (("springer finance business model") or ((("springer single business model") OR ("springer silke business model"))))*.