Perhaps you should try some spelling variations:
patients risk » patients links, patients si, patients view
patient risk » patient task, patient cost, orient risk
wang wang » wang yang, wang liang, wang yan
can lose » can close, can lost, can losers
can post » can cost, can lost, can past
among hr » among hard, among ers, among hiv

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: wang wang yanling ((can lose) OR (can post)) ((patients risk) OR (patient risk)) among hr ;~.
• Adding a wildcard symbol may retrieve word variants: wang wang yanling ((can lose) or (can post)) ((patients risk) or (patient risk)) among hr ;*.