Perhaps you should try some spelling variations:
decreased cooperation » decrease cooperation (Expand search), decreased proliferation (Expand search), decreased oxidation (Expand search)
cooperation projects » cooperation project (Expand search), cooperative projects (Expand search), conservation projects (Expand search)
and decreased » and decreases (Expand search), and increased (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease at » decrease akt (Expand search), decrease in (Expand search), decrease of (Expand search)
at decrease » rate decrease (Expand search), that decrease (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 AND decreased cooperation projects ) OR ( decrease at decrease _ decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decreased cooperation projects ) OR ( decrease at decrease _ decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decreased cooperation projects ) OR ( decrease at decrease _ decrease ))*.