Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
von cash » von carl, can cash, do cash
da costa » _ costa, a cost
yang jui » yang judy, yang di, yang xi
yan jiu » yang jie, yang jin, pang jiu
yang d » yang di, yang du, yang _
wang » wing, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wang OR wan) yan jiu ((da costa) or (von cash)) during risk ((yang d) or (yang jui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wan) yan jiu ((da costa) OR (von cash)) during risk ((yang d) OR (yang jui)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR wan) yan jiu ((da costa) or (von cash)) during risk ((yang d) or (yang jui)) ;*".