Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
among peers » among ers, among users, among letters
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
can close » can lose, a close, can cause
fan lose » can lose, can lost, fan cone

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