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 lost, can losers
can post » can cost, can lost, can postal
can past » can east, can fast, canal past

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