Perhaps you should try some spelling variations:
zen » zehn
zeng » zehng, eng, feng, peng
zend » zehnd, end, tend, send
zehen » gehen, sehen, zehn
zehend » gehend, sehend, zehnd, behend, zeheng
gehend » gehende, gehenden

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: ((zen OR zeng) OR (zehen OR ((zehend OR zend) OR gehend))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((zen OR zeng) or (zehen or ((zehend or zend) or gehend)))".
• Adding a wildcard symbol may retrieve word variants: ((zen OR zeng) or (zehen or ((zehend or zend) or gehend)))*.