Perhaps you should try some spelling variations:
zheng rong » chen rong
wang ying » wang yang, wang yong, wang jing
ying sein » ying jin, eins sein
zeng doug » jeng dong, zeng douglas
sein als » rhein als, sein des, sein das
als last » als gast, a last, his last
thing » think, thin
things » thinks, thins

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang ying sein als last (thing or things) ((zheng rong) or (zeng doug)) sin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ying sein als last (thing OR things) ((zheng rong) OR (zeng doug)) sin ;.
• Adding a wildcard symbol may retrieve word variants: wang ying sein als last (thing or things) ((zheng rong) or (zeng doug)) sin ;*.