Perhaps you should try some spelling variations:
decrease material » decreases maternal (Expand search), decrease bacterial (Expand search), decrease arterial (Expand search)
material objects » material aspects (Expand search), materials effects (Expand search), mathematical objects (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
during decrease » during increased (Expand search), during depressed (Expand search), during disease (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (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 rate decrease during decrease ) OR ( decrease NOT decrease material objects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease rate decrease during decrease ) OR ( decrease not decrease material objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease rate decrease during decrease ) OR ( decrease not decrease material objects ))*.