Perhaps you should try some spelling variations:
cost patients » cost patient, cleft patients, care patients
patients risk » patient risk, patients links, patients si
risk tong » risk among, risk along
tong shui » tong hui, cong shu, gong hui
yang jun » yang jui, yang judy, yang fan
yang jin » yang jie, ying jin, shang jin
pang jun » yang jui
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 jun) OR (yang jin))) 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 jun) OR (yang jin))) 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 jun) OR (yang jin))) or (pang jun)) cost patients risk tong shui ;*".