Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
among who » along who, among hr, wrong who
can lost » can cost, can lose, can boost
can post » can cost, can past, can postal

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