Perhaps you should try some spelling variations:
decrease theory » decrease their (Expand search), decrease the (Expand search), decreased memory (Expand search)
decrease cells » decrease cell (Expand search), decreases cell (Expand search), decrease costs (Expand search)
cells decrease » cells decreases (Expand search), cells increase (Expand search), cells increases (Expand search)
theory matters » theory master (Expand search), therapy matters (Expand search), theory better (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 cells decrease NOT decrease ) OR ( decrease rate decrease theory matters ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease cells decrease not decrease ) OR ( decrease rate decrease theory matters ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease cells decrease not decrease ) OR ( decrease rate decrease theory matters ))*.