Perhaps you should try some spelling variations:
roosts during » rights during, risks during, books during
boost during » books during, boom during, built during
cost during » crust during, west during, cost sharing
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
risk cong » risk coping, risk among, risk along
yang jin » yang jie, yang jun, ying jin

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 yang jin ((((cost during) OR (roosts during))) OR (boost during)) risk cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang yang jin ((((cost during) OR (roosts during))) or (boost during)) risk cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang wang yang jin ((((cost during) OR (roosts during))) or (boost during)) risk cong shu ;*.