Perhaps you should try some spelling variations:
iii referaten » iii referat, ii referat, den referaten
referaten von » referat von, referat vom, reformen von
david young » david loundy
you liang » you liangzhi
von david » john david, ben david, jan david
young ghi » young choi, hong ghi, young get
you xian » you can, you mean

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((you liang) OR (you xian)) iii referaten von david young ghi ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((you liang) OR (you xian)) iii referaten von david young ghi ;*.