Perhaps you should try some spelling variations:
erklarung von » erklarung der, erklarung des
zeng doug » jeng dong, zeng douglas
von last » von land, von la, von lady
doug bin » dong bin, dort bin, org bin
ring 2 » ring _, qing 2, daring 2
ring 3 » ring _, ring 2.3, ring δ13
thing » think, thin
things » thinks, thins

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: ((ring 2) OR (ring 3)) erklarung von last (thing OR (things OR thinks)) zeng doug bin ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ring 2) OR (ring 3)) erklarung von last (thing or (things or thinks)) zeng doug bin ;~".
• Adding a wildcard symbol may retrieve word variants: ((ring 2) OR (ring 3)) erklarung von last (thing or (things or thinks)) zeng doug bin ;*.