Perhaps you should try some spelling variations:
dan reformen » den reformen, der reformen, von reformen
reformen im » reformen _, formen im, reformen der
liang dan » liang tan, king dan, liang sun
david ng » david n, david a, david _
nan yan » nan ya, wang yan, qian yan
david g » david a, david _, david k

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: ((nan yan) OR (qian jun)) liang dan reformen im ((david ng) OR (david g)) g ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nan yan) or (qian jun)) liang dan reformen im ((david ng) OR (david g)) g ;~".
• Adding a wildcard symbol may retrieve word variants: ((nan yan) or (qian jun)) liang dan reformen im ((david ng) OR (david g)) g ;*.