Perhaps you should try some spelling variations:
survival procedures » surgical procedures (Expand search), surgical proceduresa (Expand search), surgical procedure (Expand search)
decreases survival » decreased survival (Expand search), increases survival (Expand search), increased survival (Expand search)
decrease after » disease after (Expand search)
after decrease » faster decrease (Expand search), after deceased (Expand search), litter decrease (Expand search)
toc decreases » c decreases (Expand search), oic decreases (Expand search), co2 decreases (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
decrease not » decrease of (Expand search), decrease at (Expand search), decrease akt (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 decreases survival procedures ) OR ( decrease NOT decrease after decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease toc decreases survival procedures ) OR ( decrease not decrease after decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease toc decreases survival procedures ) OR ( decrease not decrease after decrease ))*.