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