Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
cost patients » cost patient, cleft patients, care patients
wang yang » wang yan, wang liang, wang yanling
risk tong » risk among, risk along
tong shui » tong hui, cong shu, gong hui
yang jui » yang judy, yang di, yang xi

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang ((hang ups) or (yang jui)) cost patients risk tong shui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang ((hang ups) OR (yang jui)) cost patients risk tong shui ;.
• Adding a wildcard symbol may retrieve word variants: wang yang ((hang ups) or (yang jui)) cost patients risk tong shui ;*.