Perhaps you should try some spelling variations:
ratings risk » patients risk
lost ratings » load ratings, lost earnings, bond ratings
wang liang » wang yang
risk wrong » risk among, risk along
wrong who » wrong why, wrong what, wrong when
yang can » yang dean, yang yang, yang jin
yang fan » zhang fan, yang dean, yang yang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang liang) or (wang yan)) ((yang can) OR (yang fan)) lost ratings risk wrong who ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang liang) OR (wang yan)) ((yang can) OR (yang fan)) lost ratings risk wrong who ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang liang) or (wang yan)) ((yang can) OR (yang fan)) lost ratings risk wrong who ;*".