Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
wang luhang » wang liang, wang lihong, wang yuhan
wang zhang » wang zheng, zhang zhang, wang liang
jie debate » die debatte, wide debate, aid debate
ying jie » yang jie, ying jin, jing ji
how safe » how safety, how space, how scale

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 zhang) OR (wang luhang)) ying jie debate during crisis how safe ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang zhang) OR (wang luhang)) ying jie debate during crisis how safe ;*.