Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
lost patients » les patients, cost patient, cleft patients
wang wang » wang yang, wang liang, wang yong
among who » along who, among hr, wrong who
yang can » yang fan, yang dean, yang yang
can lost » can cost, can lose, can post

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang wang) OR (wang yan)) yang can lost patients risk among who ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang wang) OR (wang yan)) yang can lost patients risk among who ;*".