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

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 ("vers.bern.dt.gels.hno-heilkunde 1991"))) OR ("verh.been.dt.gels.hno-heilkunde 1991"))) OR ("verh.born.dt.gels.hno-heilkunde 1991")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"verh.bern.dt.gels.hno-heilkunde 1991\") OR (\"vers.bern.dt.gels.hno-heilkunde 1991\"))) or (\"verh.been.dt.gels.hno-heilkunde 1991\"))) or (\"verh.born.dt.gels.hno-heilkunde 1991\"))".
• Removing quotes may allow a broader search: (((((( verh.bern.dt.gels.hno-heilkunde 1991 ) OR ( vers.bern.dt.gels.hno-heilkunde 1991 ))) or ( verh.been.dt.gels.hno-heilkunde 1991 ))) or ( verh.born.dt.gels.hno-heilkunde 1991 )).
• Adding a wildcard symbol may retrieve word variants: (((((("verh.bern.dt.gels.hno-heilkunde 1991") OR ("vers.bern.dt.gels.hno-heilkunde 1991"))) or ("verh.been.dt.gels.hno-heilkunde 1991"))) or ("verh.born.dt.gels.hno-heilkunde 1991"))*.