Perhaps you should try some spelling variations:
during risk » using risk, during crisis, reducing risk
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
among shu » cong shu, among eu, among hr
among sex » among smes, among eu
yang d » yang di, yang du, yang _
d cost » d costs, 2 cost, 4 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 d cost ((during risk) OR (during crises)) ((among shu) OR (among sex)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yang d cost ((during risk) or (during crises)) ((among shu) OR (among sex)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang yang d cost ((during risk) or (during crises)) ((among shu) OR (among sex)) ;*.