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
among who » along who, among hr, wrong who
yang yan » yang yang, wang yan, yang fan
can lost » can lose, can post, can boost
can cost » can costa, can post, chain cost

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 yan ((can lost) or (can cost)) ((patients risk) OR (patient risk)) among who ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yan ((can lost) OR (can cost)) ((patients risk) OR (patient risk)) among who ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yan ((can lost) or (can cost)) ((patients risk) OR (patient risk)) among who ;*".