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

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