Perhaps you should try some spelling variations:
liang yanling » wang yanling, jiang yajing, liang ying
patients risk » patient risk, patients links, patients si
wang liang » wang yang
among who » along who, among hr, wrong who
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang yanling ((can lost) OR (can cost)) patients risk among who ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang yanling ((can lost) or (can cost)) patients risk among who ;*.