Perhaps you should try some spelling variations:
ratings risk » patients risk
wang liang » wang yang
liang ying » liang liying, huang ying, zhang ying
life lost » life long
diet cost » direct cost, net cost, debt cost
among men » among women
die cost » die post, die ost, time 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 ying ((((die cost) OR (life lost))) OR (diet cost)) ratings risk among men ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang ying ((((die cost) or (life lost))) or (diet cost)) ratings risk among men ;*.