Perhaps you should try some spelling variations:
risk during » risks during, risk using, crisis during
during risk » using risk, during crises, during crisis
can risk » chain risk
yang yi » yang di, yang jui
yang xi » yang di, yang jui
yang du » yang di, yang d, yang mu
tan shu » than she
yan yi » tan yi, yan zi, yin yi

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing ((((yan yi) OR (yang yi))) or (yang xi)) can risk during risk ((yang du) or (tan shu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing ((((yan yi) OR (yang yi))) OR (yang xi)) can risk during risk ((yang du) OR (tan shu)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wing ((((yan yi) OR (yang yi))) or (yang xi)) can risk during risk ((yang du) or (tan shu)) ;*".