Perhaps you should try some spelling variations:
depressed further » decrease further (Expand search), depressed mother (Expand search), depressed mothers (Expand search)
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
further decrease » further increase (Expand search), faster decrease (Expand search), the decrease (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
decrease will » decrease with (Expand search), decrease cell (Expand search), decrease il (Expand search)
decrease null » decrease cell (Expand search), decrease il (Expand search), urease null (Expand search)
null objects » null object (Expand search), null subjects (Expand search), null subject (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 during depressed further decrease ) OR ( decrease will decrease null objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed further decrease ) OR ( decrease will decrease null objects ))*.