Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
among east » among breast, among ers, among health
wang yang » wang yan, wang liang, wang yanling
yang lost » can lost
yang yin » yang yi, yang jin, yang lin
yin yang » ying yang, yi yang, yin fang

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 yin yang lost ((ratings risk) OR (patients risk)) among east ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yin yang lost ((ratings risk) OR (patients risk)) among east ;*".