Perhaps you should try some spelling variations:
22functional analysis » functional analysis, functional analyses, functionl analysis
d functionalanalysis » d funktionalanalysis, b funktionalanalysis, v funktionalanalysis
8 funktionalanalysis » b funktionalanalysis, v funktionalanalysis, der funktionalanalysis
_ functionalanalysis » b 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: %((((22functional analysis) OR (((d functionalanalysis) OR (8 funktionalanalysis))))) OR (_ functionalanalysis))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22functional analysis) or (((d functionalanalysis) OR (8 funktionalanalysis))))) or (_ functionalanalysis))%22".
• Adding a wildcard symbol may retrieve word variants: %((((22functional analysis) or (((d functionalanalysis) OR (8 funktionalanalysis))))) or (_ functionalanalysis))%22*.