Perhaps you should try some spelling variations:
decrease cooperation » defense cooperation (Expand search), decrease proliferation (Expand search), decrease migration (Expand search)
cooperation effect » cooperation effects (Expand search), cooperative effect (Expand search), cooperative effects (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt decrease » and decrease (Expand search), not decrease (Expand search), any decrease (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease pro (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to 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 OR decrease the decrease ) OR ( decrease akt decrease cooperation effect ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease or decrease the decrease ) OR ( decrease akt decrease cooperation effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease or decrease the decrease ) OR ( decrease akt decrease cooperation effect ))*.