Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
lost patients » les patients, cost patient, cleft patients
liang yang » liang ying, yang yang, huang yang
wang yang » wang yan, wang liang, wang yanling
among who » along who, among hr, wrong who
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 ((liang yang) OR (wang yang)) can lost patients risk among who ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((liang yang) OR (wang yang)) can lost patients risk among who ;*".