Perhaps you should try some spelling variations:
cost during » boost during, crust during, roosts during
west during » debt during, neet during, boost during
risk coping » risk pooling
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
yang end » yang anda, yang mind, yang d

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