Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
huang ying » huang jing, huang ting, huang yang
yang yang » wang yang, wang yan
among hui » among heis, among eu, tong hui
run cost » iran cost, can cost, run cash
au costa » can costa, _ costa, da costa

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((huang ying) or (yang yang)) ((run cost) or (au costa)) during risk among hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((huang ying) OR (yang yang)) ((run cost) OR (au costa)) during risk among hui ;.
• Adding a wildcard symbol may retrieve word variants: wang ((huang ying) or (yang yang)) ((run cost) or (au costa)) during risk among hui ;*.