Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
wang zhang » wang zheng, wang luhang, zhang zhang
zhang ying » zhang ming, zhang jing, zhang ping
risk tong » risk among, risk along
can cost » can costa, can lost, chain cost
can post » can lost, can past, can postal
tong hui » wang hui

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang zhang ying ((can cost) or (can post)) during risk tong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang zhang ying ((can cost) OR (can post)) during risk tong hui ;.
• Adding a wildcard symbol may retrieve word variants: wang zhang ying ((can cost) or (can post)) during risk tong hui ;*.