Perhaps you should try some spelling variations:
decrease cooperation » defense cooperation (Expand search), decrease proliferation (Expand search), decrease migration (Expand search)
cooperation projects » cooperation project (Expand search), cooperative projects (Expand search), conservation projects (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 of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
decrease on » decrease in (Expand search), decrease or (Expand search), decrease and (Expand search)
on decrease » on decreased (Expand search), or decrease (Expand search), and decrease (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease of decrease cooperation projects ) OR ( decrease akt decrease on decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of decrease cooperation projects ) OR ( decrease akt decrease on decrease ))*.