Perhaps you should try some spelling variations:
"verh.been.dt.good.hno-heilkunde 1991" » "verh.been.dt.good.hno-heilkunde 11", "verh.been.dt.good.hno-heilkunde 15.15", "verh.been.dt.good.hno-heilkunde 1", "vers.been.dt.good.hno-heilkunde 1991", "verb.been.dt.good.hno-heilkunde 1991", "vera.been.dt.good.hno-heilkunde 1991", "everh.been.dt.good.hno-heilkunde 1991", "vierh.been.dt.good.hno-heilkunde 1991"
"ver.been.dt.good.hno-heilkunde 10" » "ver.been.dt.good.hno-heilkunde 1", "ver.been.dt.good.hno-heilkunde 11", "ver.been.dt.good.hno-heilkunde 16", "ever.been.dt.good.hno-heilkunde 10", "vier.been.dt.good.hno-heilkunde 10"
"very.been.dt.good.hno-heilkunde 10" » "very.been.dt.good.hno-heilkunde 1", "very.been.dt.good.hno-heilkunde 11", "very.been.dt.good.hno-heilkunde 16", "every.been.dt.good.hno-heilkunde 10", "viery.been.dt.good.hno-heilkunde 10"

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.been.dt.good.hno-heilkunde 1991") OR ((("ver.been.dt.good.hno-heilkunde 10") OR ("very.been.dt.good.hno-heilkunde 10")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"verh.been.dt.good.hno-heilkunde 1991\") or (((\"ver.been.dt.good.hno-heilkunde 10\") OR (\"very.been.dt.good.hno-heilkunde 10\"))))".
• Removing quotes may allow a broader search: (( verh.been.dt.good.hno-heilkunde 1991 ) or ((( ver.been.dt.good.hno-heilkunde 10 ) OR ( very.been.dt.good.hno-heilkunde 10 )))).
• Adding a wildcard symbol may retrieve word variants: (("verh.been.dt.good.hno-heilkunde 1991") or ((("ver.been.dt.good.hno-heilkunde 10") OR ("very.been.dt.good.hno-heilkunde 10"))))*.