Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
huang jing » huang ting, huang ying, wang jing
yang liang » wang liang, yan liang, yang yang
land costs » wind costs, aid costs
land cost » land code, end cost
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 jing) OR (yang liang)) ((land cost) OR (land costs)) during risk how shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((huang jing) or (yang liang)) ((land cost) or (land costs)) during risk how shu ;*.