Perhaps you should try some spelling variations:
debat during » debate during, debt during, exit during
during risk » using risk, during crises, during crisis
wang liang » wang yang
ying hua » ming hua, wang hua, ying zhu
how safe » how safety, how space, how scale
ying du » yang du, ying zhu
how she » how some, how shih

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang ((ying du) or (ying hua)) debat during risk ((how she) OR (how safe)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((ying du) OR (ying hua)) debat during risk ((how she) OR (how safe)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang ((ying du) or (ying hua)) debat during risk ((how she) OR (how safe)) ;".
• Adding a wildcard symbol may retrieve word variants: wang liang ((ying du) or (ying hua)) debat during risk ((how she) OR (how safe)) ;*.