Perhaps you should try some spelling variations:
drei formen » die formen, zwei formen, durch formen
der formen » der reformen, die formen, der form
david hong » david ng
von david » john david, ben david, jan david
wan wang » yan wang, wang yang, qian wang
wen wang » wei wang, chen wang, weng fang
tan » than

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: ((wan wang) OR (wen wang)) liang ((drei formen) OR (der formen)) von david hong tan ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan wang) OR (wen wang)) liang ((drei formen) or (der formen)) von david hong tan ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan wang) OR (wen wang)) liang ((drei formen) or (der formen)) von david hong tan ;*.