Perhaps you should try some spelling variations:
patients links » patients clients, patients final
patients risk » patient risk, patients si, patients view
wang liang » wang yang
liang ying » liang liying, huang ying, zhang ying
ying diet » ring die
diet cost » die cost, direct cost, net cost
among men » among women

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 diet cost ((ratings risk) OR (((patients risk) OR (patients links)))) among men ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang ying diet cost ((ratings risk) or (((patients risk) OR (patients links)))) among men ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang ying diet cost ((ratings risk) or (((patients risk) OR (patients links)))) among men ;*.