Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
risk during » risks during, risk using, crisis during
crisis log » crisis box, crisis led, crisis labor
wang ryan » wang yan, wang yang, wang ban
log tail » long tail
a a » a la
dong » doing, long, done

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: ((dong sin) OR (wang ryan)) a a risk during crisis log tail ;~.
• Adding a wildcard symbol may retrieve word variants: ((dong sin) or (wang ryan)) a a risk during crisis log tail ;*.