Perhaps you should try some spelling variations:
8 funktionalanalysis » b funktionalanalysis, v funktionalanalysis, der funktionalanalysis
_ functionalanalysis » b funktionalanalysis, v funktionalanalysis, der 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: %((8 funktionalanalysis) OR (((functional analysis) OR (_ functionalanalysis))))%22.
• Adding a wildcard symbol may retrieve word variants: %((8 funktionalanalysis) or (((functional analysis) or (_ functionalanalysis))))%22*.