Perhaps you should try some spelling variations:
bond patient » bond payment, und patient, based patient
patient risk » patients risk, patient task, patient cost
among east » among breast, among ers, among health
yang yang » wang yang, wang yan
wing yan » wang yan, wing ian, wing tan
yang jun » yang jui, pang jun, yang jin

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wing yan ((yang jun) OR (yang yang)) bond patient risk among east ;~.
• Adding a wildcard symbol may retrieve word variants: wing yan ((yang jun) or (yang yang)) bond patient risk among east ;*.