Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
hua jiang » ru jiang, nu jiang
among shu » cong shu, among eu, among sex
hua yang » hui yang, huang yang, apa yang
hua cost » a cost, eu cost, run cost
end cost » end close, land cost, end iot
wang » wing, wan, lang

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 ((hua yang) OR (hua jiang)) ((hua cost) OR (end cost)) patients risk among shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((hua yang) or (hua jiang)) ((hua cost) or (end cost)) patients risk among shu ;*.