Perhaps you should try some spelling variations:
burned patients » burnt patient, surgery patients
patients risk » patient risk, patients links, patients si
among east » among breast, among health
yang yang » wang yang
among ers » among peers, among users, among heis
yang jun » yang jui, pang jun, yang jin
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan ((yang jun) or (yang yang)) burned patients risk ((among east) OR (among ers)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((yang jun) OR (yang yang)) burned patients risk ((among east) OR (among ers)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((yang jun) or (yang yang)) burned patients risk ((among east) OR (among ers)) ;*".