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)
decreased fear » decreased heart (Expand search), decreased mean (Expand search), decreased after (Expand search)
fear protocols » four protocols (Expand search), repair protocols (Expand search), ai protocols (Expand search)
not decreased » not decrease (Expand search), to decreased (Expand search), not increased (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
decrease il » decreased il (Expand search), decrease in (Expand search), decrease hiv (Expand search)
il decrease » l decrease (Expand search), will decrease (Expand search), oil decreases (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 during decrease il decrease ) OR ( decrease NOT decreased fear protocols ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease during decrease il decrease ) OR ( decrease not decreased fear protocols ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during decrease il decrease ) OR ( decrease not decreased fear protocols ))*.