Perhaps you should try some spelling variations:
ratings risk » patients risk
yan yang » yang yang, yao yang, dan yang
jun cost » run cost, eu cost
can cost » can costa, chain cost, can boost
can lost » can lose, can boost, can close
can post » can past, can postal, can boost
how she » how some, how safe, how shih
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan yang ((((((jun cost) OR (can cost))) or (can lost))) or (can post)) ratings risk how she ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yang ((((((jun cost) OR (can cost))) OR (can lost))) OR (can post)) ratings risk how she ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yang ((((((jun cost) OR (can cost))) or (can lost))) or (can post)) ratings risk how she ;".
• Adding a wildcard symbol may retrieve word variants: wang yan yang ((((((jun cost) OR (can cost))) or (can lost))) or (can post)) ratings risk how she ;*.