Perhaps you should try some spelling variations:
iii reformen » die reformen, der reformen, und reformen
iii formen » ii formen, die formen, iii form
david dang » david ian, david mant
yang yang » wang yang, wang yan
yang yan » wang yan, yang fan, yang yao
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: yang yang yan ((iii reformen) OR (iii formen)) beim ((david dang) OR (david ng)) (hai OR hadi) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang yang yan ((iii reformen) or (iii formen)) beim ((david dang) OR (david ng)) (hai or hadi) ;~".
• Adding a wildcard symbol may retrieve word variants: yang yang yan ((iii reformen) or (iii formen)) beim ((david dang) OR (david ng)) (hai or hadi) ;*.