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
yang jui » yang judy, yang di, yang xi
yang up » tying up, yang jun, hang ups
wang » wing, wan

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

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