Perhaps you should try some spelling variations:
selecting patients » selecting patient, select patients, selecting incidents
patients risk » patient risk, patients links, patients si
pooling sub » pooling fund
wang liang » wang yang
yang jui » yang judy, yang di, yang xi
yang up » tying up, yang jun, hang ups

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang ((yang up) or (yang jui)) selecting patients risk pooling sub ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((yang up) OR (yang jui)) selecting patients risk pooling sub ;.
• Adding a wildcard symbol may retrieve word variants: wang liang ((yang up) or (yang jui)) selecting patients risk pooling sub ;*.