Perhaps you should try some spelling variations:
cost patients » cost patient, cleft patients, care patients
patients risk » patient risk, patients links, patients si
among sri » among sex, among di, among ers
tying up » taking up, tying _
yang jun » yang jui, pang jun, yang jin
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 ((((tying up) OR (hang ups))) OR (yang jun)) cost patients risk among sri ;~.
• Adding a wildcard symbol may retrieve word variants: wang yanling ((((tying up) or (hang ups))) or (yang jun)) cost patients risk among sri ;*.