Perhaps you should try some spelling variations:
ratings risk » patients risk
gong qiang » gong gang, gong liutang
hong gong » hong kong, hong jong, hong hong
among shu » cong shu, among eu, among hr
among sex » among smes, among eu
qiang a » chiang a, qiang li
cost » costs

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hong gong qiang a cost ((savings rates) or (ratings risk)) ((among shu) or (among sex)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hong gong qiang a cost ((savings rates) OR (ratings risk)) ((among shu) OR (among sex)) ;.
• Adding a wildcard symbol may retrieve word variants: hong gong qiang a cost ((savings rates) or (ratings risk)) ((among shu) or (among sex)) ;*.