Perhaps you should try some spelling variations:
cost patient » cross patient, courts patient, class patient
patient risk » patients risk, patient task, patient cost
among ers » among peers, among users, among east
among sex » among smes, among eu
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 patient risk ((among ers) OR (among sex)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yanling ((yang up) or (yang jui)) cost patient risk ((among ers) or (among sex)) ;*.