Perhaps you should try some spelling variations:
method affects » method effects (Expand search), methods affect (Expand search), method effect (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decrease on (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), or decrease (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 _ decrease toc decrease ) OR ( decrease NOT decrease method affects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease _ decrease toc decrease ) OR ( decrease not decrease method affects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease _ decrease toc decrease ) OR ( decrease not decrease method affects ))*.