Perhaps you should try some spelling variations:
reformen bei » reformen beim, reformen teil, reformen der
den reformen » der reformen, von reformen, die reformen
zhang den » zhang fan, zhang wei, zhang yan
qian yi » qian yan
david n » david a, david _, david g
david k » david a, david _
wang » wing, wan, lang

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: ((wang yan) OR (qian yi)) zhang den reformen bei ((david n) OR (david k)) w ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (qian yi)) zhang den reformen bei ((david n) or (david k)) w ;*.