Perhaps you should try some spelling variations:
decrease surgical » decrease survival (Expand search), decreased survival (Expand search), decreases survival (Expand search)
rats decreases » and decreases (Expand search), but decreases (Expand search), stress decreases (Expand search)
decrease rats » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), of decrease (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (Expand search)

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: (( decrease toc decrease surgical procedures ) OR ( decrease NOT decrease rats decreases ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease toc decrease surgical procedures ) OR ( decrease not decrease rats decreases ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease toc decrease surgical procedures ) OR ( decrease not decrease rats decreases ))*.