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