Perhaps you should try some spelling variations:
cost patients » cost patient, cleft patients, care patients
patients risk » patient risk, patients links, patients si
risk cong » risk coping, risk among, risk along
yang jui » yang judy, yang di, yang xi
yang up » tying up, yang jun, hang ups
wang » wing, wan, lang

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 yanling ((yang up) OR (yang jui)) cost patients risk cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang yanling ((yang up) or (yang jui)) cost patients risk cong shu ;*.