Perhaps you should try some spelling variations:
patient risk » patients risk, patient cost, orient risk
patient task » patient cases, patient stays, patient care
wan yanling » wang yanling, wang yangming, wang danning
among shui » among sri, tong shui
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: wan yanling ((tying up) OR (yang jui)) cost ((patient risk) OR (patient task)) among shui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yanling ((tying up) or (yang jui)) cost ((patient risk) OR (patient task)) among shui ;~".
• Adding a wildcard symbol may retrieve word variants: wan yanling ((tying up) or (yang jui)) cost ((patient risk) OR (patient task)) among shui ;*.