Perhaps you should try some spelling variations:
zen » zehn
zeng » zehng, eng, feng, peng
gehenden » gehende, gehorenden, stehenden
angehenden » angehende, angehorenden, anstehenden
behende » gehende, behend, drehende

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