Perhaps you should try some spelling variations:
fordern das » fordern als, fordern am, formen das
qian pong » qian rong, qian wang
klang iii » zwang iii
klang die » klang der, klaue die
formen ab » formen a, formen das, formen im
david ng » david g, david n, david a
ng hai » dang hai, hong hai

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: qian pong ((klang iii) OR (klang die)) ((formen ab) OR (fordern das)) david ng hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "qian pong ((klang iii) OR (klang die)) ((formen ab) or (fordern das)) david ng hai ;~".
• Adding a wildcard symbol may retrieve word variants: qian pong ((klang iii) OR (klang die)) ((formen ab) or (fordern das)) david ng hai ;*.