Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
risk wrong » risk among, risk along
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
wrong who » wrong why, wrong what, wrong when
can lost » can lose, can post, can boost
can cost » can costa, can post, chain cost

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 cost)) patients risk wrong who ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang wang yang ((can lost) OR (can cost)) patients risk wrong who ;*.