Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients view
wing yanling » wang yanling, wang yangming
patients si » patients _, patients 1, patients en
tong shui » tong hui, cong shu, gong hui
tying up » taking up, tying _
pang jun » yang jui

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