Perhaps you should try some spelling variations:
die reformen » die reform, die formen, den reformen
der reformen » der reform
david dang » david ian, david mant
wang yang » wang yan, wang liang, wang yanling
yan wang » yuan wang, yang yang, qian wang
david ng » david g, david n, david a

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 yang ((die reformen) OR (der reformen)) beim ((david dang) OR (david ng)) (hai OR hari) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yan wang yang ((die reformen) OR (der reformen)) beim ((david dang) or (david ng)) (hai or hari) ;~".
• Adding a wildcard symbol may retrieve word variants: yan wang yang ((die reformen) OR (der reformen)) beim ((david dang) or (david ng)) (hai or hari) ;*.