Perhaps you should try some spelling variations:
tan reformen » von reformen, den reformen, can reforming
reformen der » formen der, reform der
der david » de david, dyker david, dror david
qian yan » qian jun, qian yi
wing tan » wing ian, liang tan, hong tan
wan yan » wang yan, nan yan, wai yan
hong ng » hong kong, hong jong, hong hong
hong g » hong w, hong 7, hong a

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 yan) OR (qian yan)) wing tan reformen der david ((hong g) OR (hong ng)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (qian yan)) wing tan reformen der david ((hong g) or (hong ng)) ;*.