Perhaps you should try some spelling variations:
"stringer bridging business model" » "transfer bridging business model", "bridge bridging business model", "miner bridging business model", "stringer building business model", "stringer changing business model", "stringer managing business model", "stringer bridging business models"
"springer science using model" » "stronger science using model", "spring resilience using model", "river science using model", "springer science ising model", "springer science using mobile"
"stringer bridge business model" » "schrodinger bridge business model", "bettinger bridget business model", "hardanger bridge business model", "stringer bring business model", "stringer edge business model", "stringer guide business model", "stringer bridge 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 science using model") OR ((("stringer bridge business model") OR ("stringer bridging business model")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"springer science using model\") or (((\"stringer bridge business model\") OR (\"stringer bridging business model\"))))".
• Removing quotes may allow a broader search: (( springer science using model ) or ((( stringer bridge business model ) OR ( stringer bridging business model )))).
• Adding a wildcard symbol may retrieve word variants: (("springer science using model") or ((("stringer bridge business model") OR ("stringer bridging business model"))))*.