Perhaps you should try some spelling variations:
ratings risk » patients risk
lost ratings » load ratings, lost earnings, bond ratings
liang yang » wang yang, yang yang, huang yang
liang ying » liang liying, huang ying, zhang ying
among ers » among peers, among users, among east
can lost » can cost, can lose, can post

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 yang) OR (liang ying)) can lost ratings risk among ers ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((liang yang) OR (liang ying)) can lost ratings risk among ers ;*".