Perhaps you should try some spelling variations:
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease in (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc decrease » the decrease (Expand search), not decrease (Expand search), or decrease (Expand search)
decrease tlc » decrease the (Expand search), decrease il (Expand search), decrease cell (Expand search)
decrease to » decreased to (Expand search), decrease the (Expand search), decrease pro (Expand search)
tlc based » plc based (Expand search), vlc based (Expand search), tdc 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 to decrease ) OR ( decrease toc decrease tlc based ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease risk decrease to decrease ) OR ( decrease toc decrease tlc based ))*.