Perhaps you should try some spelling variations:
"vers.bern.dt.geld.hno-heilkunde 1991" » "vers.bern.dt.geld.hno-heilkunde 11", "vers.bern.dt.geld.hno-heilkunde 15.15", "vers.bern.dt.geld.hno-heilkunde 1", "verse.bern.dt.geld.hno-heilkunde 1991", "very.bern.dt.geld.hno-heilkunde 1991", "ver.bern.dt.geld.hno-heilkunde 1991", "vers.been.dt.geld.hno-heilkunde 1991", "vers.born.dt.geld.hno-heilkunde 1991", "vers.ben.dt.geld.hno-heilkunde 1991", "vers.bern.dt.gold.hno-heilkunde 1991", "vers.bern.dt.gel.hno-heilkunde 1991"
"verso.bern.dt.geld.hno-heilkunde 1991" » "verso.bern.dt.geld.hno-heilkunde 11", "verso.bern.dt.geld.hno-heilkunde 15.15", "verso.bern.dt.geld.hno-heilkunde 1", "verseo.bern.dt.geld.hno-heilkunde 1991", "veryo.bern.dt.geld.hno-heilkunde 1991", "vero.bern.dt.geld.hno-heilkunde 1991", "verso.been.dt.geld.hno-heilkunde 1991", "verso.born.dt.geld.hno-heilkunde 1991", "verso.ben.dt.geld.hno-heilkunde 1991", "verso.bern.dt.gold.hno-heilkunde 1991", "verso.bern.dt.gel.hno-heilkunde 1991", "verse.bern.dt.geld.hno-heilkunde 1991"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("vers.bern.dt.geld.hno-heilkunde 1991") OR ("verso.bern.dt.geld.hno-heilkunde 1991")).
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