Perhaps you should try some spelling variations:
savings risk » ratings risk, savings cross, savings rate
liang ying » liang liying, huang ying, jiang yajing
zhang ying » zhang ming, zhang jing, zhang ping
risk wrong » risk among, risk along
wang yang » wang yan, wang liang, wang yanling
oder cost » der cost, lower cost, power cost
wrong who » wrong why, wrong what, wrong when

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) OR (((liang ying) OR (zhang ying)))) oder cost savings risk wrong who ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((wang yang) or (((liang ying) or (zhang ying)))) oder cost savings risk wrong who ;*.