Perhaps you should try some spelling variations:
during risk » during crises, during crisis, reducing risk
using risk » using rs, funding risk, rising risks
wang yang » wang yan, wang liang, wang yanling
yang ying » yang yang, yang jing, huang ying
au costa » can costa, _ costa, da costa
how shih » how six, how she
eu cost » der cost, end cost, eu court

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 yang ying ((eu cost) OR (au costa)) ((during risk) OR (using risk)) how shih ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ying ((eu cost) OR (au costa)) ((during risk) or (using risk)) how shih ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang ying ((eu cost) OR (au costa)) ((during risk) or (using risk)) how shih ;*.