Perhaps you should try some spelling variations:
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)
decrease block » decrease blood (Expand search), increase block (Expand search), decreases blood (Expand search)
block pattern » block patterns (Expand search), flock pattern (Expand search), block eastern (Expand search)

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

• Removing quotes may allow a broader search: (( decrease NOT decrease _ decrease ) OR ( decrease during decrease block pattern ))*.