Perhaps you should try some spelling variations:
lose patients » les patients, obese patients, care patients
patients risk » patient risk, patients links, patients si
wang wang » wang liang, wang yong, wang jing
wang yang » wang liang, wang yanling
dean lose » can lose
among who » along who, among hr, wrong who

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 wang) OR (wang yang))) OR (wang yan)) yang dean lose patients risk among who ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wang wang) OR (wang yang))) or (wang yan)) yang dean lose patients risk among who ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wang wang) OR (wang yang))) or (wang yan)) yang dean lose patients risk among who ;*.