Perhaps you should try some spelling variations:
d functionalanalysis » d funktionalanalysis, 8 funktionalanalysis, v funktionalanalysis
b funktionalanalysis » 8 funktionalanalysis, v funktionalanalysis, uber funktionalanalysis
_ functionalanalysis » 8 funktionalanalysis, v funktionalanalysis, functional analysis

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 (b funktionalanalysis))) OR (_ functionalanalysis))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((d functionalanalysis) OR (b funktionalanalysis))) or (_ functionalanalysis))%22".
• Adding a wildcard symbol may retrieve word variants: %((((d functionalanalysis) OR (b funktionalanalysis))) or (_ functionalanalysis))%22*.