Perhaps you should try some spelling variations:
debatte during » debate during, debt during
during crisis » during crises, housing crisis
wang zhang » wang zheng, wang luhang, zhang zhang
zhang ying » zhang ming, zhang jing, zhang ping
how space » how race
ying die » ring die, ying jin
how safe » how safety, how scale, how state

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang zhang ying die debatte during crisis ((how safe) OR (how space)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang zhang ying die debatte during crisis ((how safe) or (how space)) ;*.