Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
during risk » using risk, during crises, reducing risk
among shu » cong shu, among eu, among sex
yan yang » yang yang, yao yang, dan yang
d iot » _ iot, 2 iot, 3 iot
4 iot » _ iot
wang » wing, wan, lang

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 yan yang ((d iot) OR (4 iot)) ((during risk) OR (during crisis)) among shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yang ((d iot) or (4 iot)) ((during risk) OR (during crisis)) among shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan yang ((d iot) or (4 iot)) ((during risk) OR (during crisis)) among shu ;*.