Perhaps you should try some spelling variations:
uber funktionalanalysis » der funktionalanalysis, die funktionalanalysis, und funktionalanalysis
_ functionalanalysis » 8 funktionalanalysis, b funktionalanalysis, v funktionalanalysis
functional » function, functions
functionalanalysis » functionanalysis, functionsanalysis

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: %((functional analysis) OR (((_ functionalanalysis) OR (uber funktionalanalysis))))%22.
• Adding a wildcard symbol may retrieve word variants: %((functional analysis) or (((_ functionalanalysis) or (uber funktionalanalysis))))%22*.