Perhaps you should try some spelling variations:
patients risk » patients links, patients si, patients view
patient risk » patient task, patient cost, orient risk
wang yang » wang yan, wang liang, wang yanling
along shi » along who
yang jin » yang jie, yang jun, ying jin
yang up » yang jui, tying up, yang jun

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 jin)) failure ((patients risk) OR (patient risk)) along shi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang ((yang up) OR (yang jin)) failure ((patients risk) OR (patient risk)) along shi ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ((yang up) or (yang jin)) failure ((patients risk) OR (patient risk)) along shi ;*".