Perhaps you should try some spelling variations:
patient risk » patients risk, patient task, patient cost
patients si » patients _, patients 1, patients en
among peers » among ers, among users, among letters
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
dean 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 liang yang dean lose ((patients si) or (patient risk)) among peers ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang yang dean lose ((patients si) OR (patient risk)) among peers ;*.