Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
cost patients » cost patient, cleft patients, care patients
risk tong » risk among, risk along
tong shui » tong hui, cong shu, gong hui
tying up » taking up, tying _
pang jun » yang jui
yang up » yang jui, yang jun, hang ups
wang » wing, wan, lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan ((((yang up) OR (tying up))) or (pang jun)) cost patients risk tong shui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((((yang up) OR (tying up))) OR (pang jun)) cost patients risk tong shui ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((((yang up) OR (tying up))) or (pang jun)) cost patients risk tong shui ;*".