Perhaps you should try some spelling variations:
patient risk » patients risk, patient task, patient cost
cost patient » cross patient, courts patient, class patient
wang yang » wang yan, wang liang, wang yanling
tong shui » tong hui, cong shu
yang jun » yang jui, pang jun, yang jin
gong hui » tong hui, wang hui, gong si
yang up » yang jui, tying up, hang ups

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 ((yang up) or (yang jun)) cost patient risk ((tong shui) OR (gong hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang ((yang up) OR (yang jun)) cost patient risk ((tong shui) OR (gong hui)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ((yang up) or (yang jun)) cost patient risk ((tong shui) OR (gong hui)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yang ((yang up) or (yang jun)) cost patient risk ((tong shui) OR (gong hui)) ;*.