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 ers, among health
yang yang » wang yang, wang yan
wing yan » wang yan, wing ian, wing tan
yang jui » yang judy, yang di, yang xi

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing yan ((yang jui) or (yang yang)) burned patients risk among east ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing yan ((yang jui) OR (yang yang)) burned patients risk among east ;*.