Perhaps you should try some spelling variations:
drei formen » die formen, zwei formen, durch formen
wang liang » wang yang
der formen » der reformen, die formen, der form
john david » cohen david, sahn david, juan david
yan wang » yuan wang, yang yang, qian wang
david ng » david g, david n, david a
ng tan » hong tan, wing tan

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: yan wang liang ((drei formen) OR (der formen)) john david ng tan ;~.
• Adding a wildcard symbol may retrieve word variants: yan wang liang ((drei formen) or (der formen)) john david ng tan ;*.