Perhaps you should try some spelling variations:
depressed learning » compressed learning (Expand search), directed learning (Expand search), depressed cladding (Expand search)
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
decrease faster » decrease after (Expand search), decrease further (Expand search), decreased after (Expand search)
faster decrease » rate decrease (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
learning object » learning objects (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease il decrease faster decrease ) OR ( decrease during depressed learning object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease il decrease faster decrease ) OR ( decrease during depressed learning object ))*.