Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
iot during » boost during, built during, sport during
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
yang end » yang anda, yang mind, yang d
among hr » among hard, among ers, among hiv
end iot » end note, end 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 yang yang end iot during risk ((among hr) OR (cong shu)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang yang end iot during risk ((among hr) or (cong shu)) ;*.