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
risk tong » risk among, risk along
tong shui » tong hui, cong shu, gong hui
tying up » taking up, tying _
yang jui » yang judy, yang di, yang xi

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