Perhaps you should try some spelling variations:
risk during » risks during, risk using, crisis during
yang power » making power, buying power, taxing power
power cost » power costs, power costa, lower cost
risk doing » risk coping, risk loving, risk using
wang yong » wang yang, wang hyoung, wang yan
yong yang » yang yang, dong yang, ying yang

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 yong yang power cost savings ((risk doing) OR (risk during)) what ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong yang power cost savings ((risk doing) or (risk during)) what ;*.