Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
wang tang » wang yang, tang tang, wang liang
can lost » can cost, can lose, can post
von cash » can cash, do cash, von cand
von carl » von karl
yang shu » tan shu, yang du, yang hui
tang yi » yang yi, tang li, tan yi

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: wang tang yi ((can lost) OR (((von cash) OR (von carl)))) during risk ((yang shu) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang tang yi ((can lost) or (((von cash) OR (von carl)))) during risk ((yang shu) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang tang yi ((can lost) or (((von cash) OR (von carl)))) during risk ((yang shu) or (cong shu)) ;*.