Perhaps you should try some spelling variations:
during risk » during crises, during crisis, reducing risk
huang ying » huang jing, huang ting, huang yang
land crust » land trust, land trusts, land rush
using risk » using rs, funding risk, rising risks
yang jing » wang jing, yang jin, huang jing
how shu » how she, how shih, how slum

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 ((huang ying) OR (yang jing)) land crust ((during risk) OR (using risk)) how shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((huang ying) or (yang jing)) land crust ((during risk) OR (using risk)) how shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((huang ying) or (yang jing)) land crust ((during risk) OR (using risk)) how shu ;*.