Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
cost patients » cost patient, cleft patients, care patients
wang liang » wang yang
among shui » among sri
tong shui » tong hui, cong shu, gong hui
yang jun » yang jui, pang jun, yang jin
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 patients risk ((among shui) OR (tong shui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((yang up) OR (yang jun)) cost patients risk ((among shui) OR (tong shui)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang ((yang up) or (yang jun)) cost patients risk ((among shui) OR (tong shui)) ;".
• Adding a wildcard symbol may retrieve word variants: wang liang ((yang up) or (yang jun)) cost patients risk ((among shui) OR (tong shui)) ;*.