Perhaps you should try some spelling variations:
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
decrease drugs » disease drugs (Expand search), decrease treg (Expand search), release drugs (Expand search)
drugs decrease » drugs increases (Expand search), drugs release (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not decrease (Expand search)
during object » using object (Expand search), moving object (Expand search)
decrees that » devices that (Expand search), trees that (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: (( decrees that decrease drugs decrease ) OR ( decrease AND decrease during object ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrees that decrease drugs decrease ) OR ( decrease and decrease during object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrees that decrease drugs decrease ) OR ( decrease and decrease during object ))*.