Perhaps you should try some spelling variations:
ratings risk » patients risk
lost ratings » load ratings, lost earnings, bond ratings
wang wang » wang yang, wang liang, wang yan
yang yang » wang yang, wang yan
among who » along who, among hr, wrong who
yan yang » dan yang, tan yang, yan wang

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 ((((yan yang) OR (yang yang))) OR (yao yang)) lost ratings risk among who ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang ((((yan yang) OR (yang yang))) or (yao yang)) lost ratings risk among who ;~".
• Adding a wildcard symbol may retrieve word variants: wang wang ((((yan yang) OR (yang yang))) or (yao yang)) lost ratings risk among who ;*.