Perhaps you should try some spelling variations:
during butterfly » feeding butterfly (Expand search), in butterfly (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search)
decrease toc » decrease of (Expand search), decreased to (Expand search), decrease on (Expand search)
toc decrease » to decrease (Expand search), not decrease (Expand search), or decrease (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (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 the decrease toc decrease ) OR ( decrease AND decrease during butterfly ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease the decrease toc decrease ) OR ( decrease and decrease during butterfly ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decrease toc decrease ) OR ( decrease and decrease during butterfly ))*.