Perhaps you should try some spelling variations:
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease with (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
decrease cots » decrease costs (Expand search), decrease its (Expand search), decrease total (Expand search)
decrease can » decrease and (Expand search), decrease at (Expand search), decrease on (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)
cots based » dots based (Expand search), cots baseado (Expand search), plots based (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease risk decrease can decrease ) OR ( decrease in decrease cots based ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease risk decrease can decrease ) OR ( decrease in decrease cots based ))*.