Perhaps you should try some spelling variations:
functionalanalytic%22 » funktionalanalysis%22, funktionalanalytische%22, functionaalanalyse%22
funktionalanalyis%22 » funktionalanalysis%22, funktionsanalysis%22, funktionalanalytische%22
funktionalanalyse%22 » funktionalanalysis%22, functionaalanalyse%22, funktionsanalyse%22

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: %_ (functionalanalytic%22 OR (funktionalanalyis%22 OR funktionalanalyse%22)).
• Adding a wildcard symbol may retrieve word variants: %_ (functionalanalytic%22 or (funktionalanalyis%22 or funktionalanalyse%22))*.