Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
can costa » can cost, can postal, da costa
risk yang » risk young, risk anp
von cash » von carl, can cash, do cash
wai ban » wai yan, wang ban
yang mu » yang du, yang muxi, yang jui
ban zi » ban ji, yan zi

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

• Performing a fuzzy search may retrieve terms with similar spellings: wai ban zi ((can costa) or (von cash)) during risk yang mu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wai ban zi ((can costa) OR (von cash)) during risk yang mu ;*.