Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
jie debate » die debatte, wide debate, ce debate
aid debate » gain debate, wide debate, a debate
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 liang yang ((jie debate) OR (aid debate)) during crisis how safe ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang yang ((jie debate) OR (aid debate)) during crisis how safe ;*.