Perhaps you should try some spelling variations:
22functional analysis » functional analysis, functional analyses, functionl analysis
d functionalanalysis » d funktionalanalysis, 8 funktionalanalysis, b funktionalanalysis
_ functionalanalysis » 8 funktionalanalysis, b funktionalanalysis, functional analysis
v funktionalanalysis » 8 funktionalanalysis, b funktionalanalysis, der funktionalanalysis

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