Perhaps you should try some spelling variations:
d functionalanalysis » _ functionalanalysis, d funktionalanalysis, 8 funktionalanalysis
functional analyses » functional analysis, function analysis, functional analytic
functionl analysis » functional analysis, function analysis, 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: %((((functionl analysis) OR (d functionalanalysis))) OR (functional analyses))%22.
• Adding a wildcard symbol may retrieve word variants: %((((functionl analysis) or (d functionalanalysis))) or (functional analyses))%22*.