Perhaps you should try some spelling variations:
yijiang wang » yiqian wang
der reformen » der reform
iii formen » ii formen, die formen, iii form
david dang » david ian, david mant, david ng
wang yang » wang yan, wang liang, wang yanling
de david » die david, wade david, dawe david
hai » hadi, haji, hari

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: ((yijiang wang) OR (wang yang)) yang ((der reformen) OR (iii formen)) de david dang hai ;~.
• Adding a wildcard symbol may retrieve word variants: ((yijiang wang) or (wang yang)) yang ((der reformen) or (iii formen)) de david dang hai ;*.