Perhaps you should try some spelling variations:
ratings risk » patients risk
savings risk » savings cross, savings rate, savings bank
liang lilin » liang liying, jiang liping
wang yang » wang yan, wang liang, wang yanling
oder cost » der cost, lower cost, power cost
among who » along who, among hr, wrong who

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((wang yang) or (liang lilin)) oder cost ((savings risk) OR (ratings risk)) among who ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((wang yang) OR (liang lilin)) oder cost ((savings risk) OR (ratings risk)) among who ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((wang yang) or (liang lilin)) oder cost ((savings risk) OR (ratings risk)) among who ;".
• Adding a wildcard symbol may retrieve word variants: wang ((wang yang) or (liang lilin)) oder cost ((savings risk) OR (ratings risk)) among who ;*.