Perhaps you should try some spelling variations:
"verh.bern.dt.gels.hno-heilkunde 1991" » "verh.bern.dt.gels.hno-heilkunde 15.15", "verh.bern.dt.gels.hno-heilkunde 1", "verh.bern.dt.gels.hno-heilkunde 10", "very.bern.dt.gels.hno-heilkunde 1991", "ver.bern.dt.gels.hno-heilkunde 1991", "vers.bern.dt.gels.hno-heilkunde 1991", "verh.been.dt.gels.hno-heilkunde 1991", "verh.ben.dt.gels.hno-heilkunde 1991", "verh.bern.dt.gel.hno-heilkunde 1991", "verh.bern.dt.gets.hno-heilkunde 1991", "verh.bern.dt.geld.hno-heilkunde 1991"
"verh.born.dt.gels.hno-heilkunde 11" » "verh.born.dt.gels.hno-heilkunde 1", "verh.born.dt.gels.hno-heilkunde 10", "verh.born.dt.gels.hno-heilkunde 16", "very.born.dt.gels.hno-heilkunde 11", "ver.born.dt.gels.hno-heilkunde 11", "vers.born.dt.gels.hno-heilkunde 11", "verh.born.dt.gel.hno-heilkunde 11", "verh.born.dt.gets.hno-heilkunde 11", "verh.born.dt.geld.hno-heilkunde 11"

Try widening your search to All Fields.

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: (("verh.bern.dt.gels.hno-heilkunde 1991") OR ("verh.born.dt.gels.hno-heilkunde 11")).
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• Adding a wildcard symbol may retrieve word variants: (("verh.bern.dt.gels.hno-heilkunde 1991") or ("verh.born.dt.gels.hno-heilkunde 11"))*.