Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
lose patients » les patients, obese patients, care patients
among peers » among ers, among users, among letters
wang liang » wang yang
yang can » yang dean, yang yang, yang jin
yang fan » zhang fan, yang dean, yang yang

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 can) OR (yang fan)) lose patients risk among peers ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang ((yang can) OR (yang fan)) lose patients risk among peers ;*".