Perhaps you should try some spelling variations:
ratings risk » patients risk
cost ratings » cost savings, costs savings, bond ratings
wang liang » wang yang
tong shui » cong shu, gong hui
yang jun » yang jui, pang jun, yang jin
tong hui » wang hui
yang up » yang jui, tying up, hang ups

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 up) or (yang jun)) cost ratings risk ((tong shui) OR (tong hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((yang up) OR (yang jun)) cost ratings risk ((tong shui) OR (tong hui)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang ((yang up) or (yang jun)) cost ratings risk ((tong shui) OR (tong hui)) ;*".