Perhaps you should try some spelling variations:
risks during » risk during, risks facing, banks during
yang power » making power, buying power, taxing power
power cost » power costs, power costa, lower cost
risk doing » risk coping, risk during, risk loving
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling

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