Perhaps you should try some spelling variations:
der reformen » der reform
reformen im » reformen _, formen im, reformen der
wang liang » wang yang
david dang » david ian, david ng
david mant » david ian, david ma, david malone
liang der » gang der, klang der, ding der
yan wang » yuan wang, yang yang, qian wang

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 der reformen im ((david dang) OR (david mant)) (hai OR hadi) ;~.
• Adding a wildcard symbol may retrieve word variants: yan wang liang der reformen im ((david dang) or (david mant)) (hai or hadi) ;*.