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

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