Perhaps you should try some spelling variations:
dene » den, denk, deng
denne » dense, donne, deine, dene, wenne, danne
wenne » wenner, wenn, wende
twenne » twenner, twenn, twende, twente
denn » den, wenn, dann

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: ((dene OR ((denne OR (wenne OR twenne)) OR dene)) OR denn).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dene or ((denne or (wenne OR twenne)) or dene)) or denn)".
• Adding a wildcard symbol may retrieve word variants: ((dene or ((denne or (wenne OR twenne)) or dene)) or denn)*.