Perhaps you should try some spelling variations:
den reformen » von reformen, die reformen, den referaten
der reformen » der reform
david hong » david ng
you liang » you xian, you liangzhi
hong ghi » zhong zhi, hong g, hong hai
wan you » want you, warn you, can you
bulman » bulan

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: wan you liang ((der reformen) OR (den reformen)) bulman david hong ghi ;~.
• Adding a wildcard symbol may retrieve word variants: wan you liang ((der reformen) or (den reformen)) bulman david hong ghi ;*.