Perhaps you should try some spelling variations:
fordern das » fordern als, fordern am, formen das
rong zwang » hong wang
formen lam » formen im, formen a, formen ab
zwang iii » zugang iii, klang iii
david ng » david g, david n, david a
ng hai » dang hai, hong hai
qian » ian, kian, jian

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 rong zwang iii ((formen lam) OR (fordern das)) david ng hai ;~.
• Adding a wildcard symbol may retrieve word variants: qian rong zwang iii ((formen lam) or (fordern das)) david ng hai ;*.