Perhaps you should try some spelling variations:
die reformen » die reform, die formen, der reformen
reformen von » formen von, reform von, referaten von
von david » john david, ben david, jan david
zhang zhi » zhong zhi, wang zhi, zhang wei
you zhen » you when, you zhi, yu zheng
you her » you hear, you where, you ever

You may be able to get more results by adjusting your search query.

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