Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
cost during » boost during, crust during, west during
zhang ping » zhang ming, zhang jing, zhang ying
zhang ting » zhang ming, zhang jing, zhang ying
risk cong » risk coping, risk among, risk along
yu cost » eu cost, au costa, run cost

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 ((zhang ping) OR (zhang ting)) yu cost during risk cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((zhang ping) or (zhang ting)) yu cost during risk cong shu ;*.