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