Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
during risk » using risk, during crises, reducing risk
wang dan » wang yan, wang ban, wang yidan
dan ying » dan qing, dan yang, fan ying
can lose » can close, can lost, can losers
von carl » von karl
yang shu » cong shu, tan shu, yang du

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 dan ying ((can lose) OR (von carl)) ((during risk) OR (during crisis)) yang shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang dan ying ((can lose) or (von carl)) ((during risk) or (during crisis)) yang shu ;*.