Perhaps you should try some spelling variations:
die reformen » die reform, die formen, der reformen
von david » john david, ben david
jan david » juan david, sahn david, alan david
zhang zhi » zhong zhi, wang zhi, zhang dai
zhang wei » zhen wei
warn you » earn your, can you, when you
zhi die » thi diem

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: warn you zhi die reformen ((von david) OR (jan david)) ((zhang zhi) OR (zhang wei)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "warn you zhi die reformen ((von david) or (jan david)) ((zhang zhi) OR (zhang wei)) ;~".
• Adding a wildcard symbol may retrieve word variants: warn you zhi die reformen ((von david) or (jan david)) ((zhang zhi) OR (zhang wei)) ;*.