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 zhong » xiang zhong, wang hong, wang zheng
tang zheng » wang zheng, fang sheng, fang zhen
fan lose » can lose, can close, can lost

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 zhong) OR (tang zheng)) fan lose ((patients risk) or (patient care)) among peers ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yang zhong) OR (tang zheng)) fan lose ((patients risk) OR (patient care)) among peers ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang zhong) OR (tang zheng)) fan lose ((patients risk) or (patient care)) among peers ;*".