Perhaps you should try some spelling variations:
cost patients » cost patient, cleft patients, care patients
patients risk » patient risk, patients links, patients si
wang liang » wang yang
tong shui » cong shu, gong hui
pang jun » yang jui
tong hui » wang hui
yang up » yang jui, tying up, yang jun

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang ((yang up) OR (pang jun)) cost patients risk ((tong shui) OR (tong hui)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang ((yang up) OR (pang jun)) cost patients risk ((tong shui) OR (tong hui)) ;*.