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

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: %((((d functionalanalysis) OR (8 funktionalanalysis))) OR (functional analyses))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((d functionalanalysis) OR (8 funktionalanalysis))) or (functional analyses))%22".
• Adding a wildcard symbol may retrieve word variants: %((((d functionalanalysis) OR (8 funktionalanalysis))) or (functional analyses))%22*.