Perhaps you should try some spelling variations:
wei reformen » der reformen, den reformen, iii reformen
reformen von » formen von, reform von, referaten von
yan zhang » yuan chang, bin zhang, han chang
zhang wei » zhen wei
von david » john david, ben david, jan david
hong hai » shang hai, zhong tai, dang hai
hong ghi » zhong zhi, hong g
wan yan » wang yan, nan yan, wai yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan zhang wei reformen von david ((hong hai) or (hong ghi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan zhang wei reformen von david ((hong hai) OR (hong ghi)) ;*.