Perhaps you should try some spelling variations:
method affects » method effects (Expand search), methods affect (Expand search), method effect (Expand search)
decrease toc » decrease the (Expand search), decrease on (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
decrease at » decrease and (Expand search), decrease in (Expand search), decrease _ (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and decrease (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 of decrease toc decrease ) OR ( decrease at decrease method affects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of decrease toc decrease ) OR ( decrease at decrease method affects ))*.