Perhaps you should try some spelling variations:
cost during » boost during, crust during, west during
during risk » using risk, during crises, during crisis
wang yang » wang yan, wang yanling
yang mind » yang cindy, yang jin, sang minh
risk cong » risk coping, risk among, risk along
yang end » yang anda, 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 yang) OR (wang liang)) ((yang end) OR (yang mind)) cost during risk cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (wang liang)) ((yang end) OR (yang mind)) cost during risk cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang liang)) ((yang end) OR (yang mind)) cost during risk cong shu ;*.