Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
von carl » von karl
yang jin » yang jie, yang jun, ying jin
a costs » a cost, 3 costs, 4 costs
do case » do cash, do care, two case
yang mu » yang du, yang muxi, yang jui
h yang » _ yang, hui yang

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: h yang jin ((a costs) OR (((do case) OR (von carl)))) during risk ((yang mu) OR (yang di)) ;~.
• Adding a wildcard symbol may retrieve word variants: h yang jin ((a costs) or (((do case) or (von carl)))) during risk ((yang mu) or (yang di)) ;*.