Perhaps you should try some spelling variations:
den reformen » von reformen, die reformen, den referaten
der reformen » der reform
zhang zhi » zhong zhi, wang zhi, zhang wei
zhong tai » hong tan, hong hai, zhong zhi
do zhang » ceo zhang, hao zhang, _ zhang
a davis » _ davis, m davis, a david

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: when do zhang ((den reformen) OR (der reformen)) a davis ((zhang zhi) OR (zhong tai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "when do zhang ((den reformen) OR (der reformen)) a davis ((zhang zhi) or (zhong tai)) ;~".
• Adding a wildcard symbol may retrieve word variants: when do zhang ((den reformen) OR (der reformen)) a davis ((zhang zhi) or (zhong tai)) ;*.