Perhaps you should try some spelling variations:
cost patients » cleft patients, care patients, des patients
cost patient » cross patient, courts patient, class patient
wang liang » wang yang
risk tong » risk among, risk along
tong shui » tong hui, cong shu, gong hui
yang jin » yang jie, yang jun, ying jin
yang up » yang jui, tying up, yang jun

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((yang up) OR (yang jin)) ((cost patients) OR (cost patient)) risk tong shui ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang ((yang up) or (yang jin)) ((cost patients) or (cost patient)) risk tong shui ;*.