Perhaps you should try some spelling variations:
reformen von » formen von, reform von, referaten von
klarung der » klarung des, erklarung der, erklarung des
klang der » gang der
von david » john david, ben david, jan david
young ghi » young choi, hong ghi, young get
young er » young hr, young men, young eun

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: (wing OR lang) yan ((klang der) OR (klarung der)) reformen von david ((young ghi) OR (young er)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wing or lang) yan ((klang der) OR (klarung der)) reformen von david ((young ghi) or (young er)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wing or lang) yan ((klang der) OR (klarung der)) reformen von david ((young ghi) or (young er)) ;*.