Perhaps you should try some spelling variations:
risk coping » risk pooling
using risk » during risk, using rs, funding risk
coping shu » cong shu
iot using » pilot using, boot using, att using
wang yang » wang liang, wang yanling
yang du » yang di, yang d, yang mu
du iot » du chiot

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) OR (wang yan)) yang du iot using risk coping shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang yan)) yang du iot using risk coping shu ;*.