Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
patient care » inpatient care, outpatient care
among peers » among ers, among users, among letters
yang zhang » yan zhang, zhang zhang, yang yang
zhang fang » zhang fan, zhang zhang, zhang yan
wang yang » wang yan, wang liang, wang yanling
fang lose » can lose

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 zhang fang lose ((patients risk) or (patient care)) among peers ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang zhang fang lose ((patients risk) OR (patient care)) among peers ;*.