Perhaps you should try some spelling variations:
ratings risk » patients risk
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
among ers » among peers, among users, among east
can lose » can close, can losers, can't lose
can lost » can cost, can boost, can close
can post » can cost, can past, can postal

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