Perhaps you should try some spelling variations:
boost during » roosts during, books during, boom during
cost during » crust during, west during, roosts during
wang wang » wang yang, wang liang, wang yan
wang ying » wang yang, wang yong, wang jing
risk cong » risk coping, risk among, risk along
ying jin » yang jin, jing ji, yang jie

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 wang ying jin ((cost during) OR (boost during)) risk cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang wang ying jin ((cost during) or (boost during)) risk cong shu ;*.