Perhaps you should try some spelling variations:
decrease separation » decrease cooperation (Expand search), decrease migration (Expand search), microphase separation (Expand search)
separation process » separation processes (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)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease during decrease separation process ) OR ( decrease _ decrease in decrease ))~.