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

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: (((( verb.bern.dt.geld.hno-heilkunde 1991 ) OR ((( very.born.dt.geld.hno-heilkunde 1991 ) OR ( very.born.dt.gel.hno-heilkunde 1991 ))))) OR ( verse.bern.dt.gels.hno-heilkunde 1991 )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( verb.bern.dt.geld.hno-heilkunde 1991 ) or ((( very.born.dt.geld.hno-heilkunde 1991 ) OR ( very.born.dt.gel.hno-heilkunde 1991 ))))) or ( verse.bern.dt.gels.hno-heilkunde 1991 ))".
• Adding a wildcard symbol may retrieve word variants: (((( verb.bern.dt.geld.hno-heilkunde 1991 ) or ((( very.born.dt.geld.hno-heilkunde 1991 ) OR ( very.born.dt.gel.hno-heilkunde 1991 ))))) or ( verse.bern.dt.gels.hno-heilkunde 1991 ))*.