Perhaps you should try some spelling variations:
zeng » eng, feng, peng
zehng » zehn, zehnt, zehnj
zeheng » zhenheng, geheng, seheng, zehng
zehen » gehen, sehen, zehn
zehend » gehend, sehend, zehnd, behend

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