Perhaps you should try some spelling variations:
boost during » roosts during, books during, boom during
during risk » using risk, during crises, during crisis
und boost » und bose
daun yang » du yang, tan yang, un yang
risk cong » risk coping, risk among, risk along
dan yang » tan yang, wang yang, yang yang

You may be able to get more results by adjusting your search query.

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