Perhaps you should try some spelling variations:
ratings risk » patients risk
cost ratings » cost savings, costs savings, bond ratings
zhang hui » zhang yuhui, zhang shuo, chuang hui
among shu » cong shu, among eu, among sex
yang hui » wang hui, yang muxi, yang di
yang jui » yang judy, yang di, yang xi
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 hua ((((yang hui) OR (zhang hui))) or (yang jui)) cost ratings risk among shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang hua ((((yang hui) OR (zhang hui))) OR (yang jui)) cost ratings risk among shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hua ((((yang hui) OR (zhang hui))) or (yang jui)) cost ratings risk among shu ;*".