Perhaps you should try some spelling variations:
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
decrease theory » decrease their (Expand search), decreased memory (Expand search), decrement theory (Expand search)
theory decrease » the decrease (Expand search), therapy decreases (Expand search), memory decreases (Expand search)
depressed or » depressed nk (Expand search), depressed 26 (Expand search), depressed to (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (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 depressed OR decrease ) OR ( decrease theory decrease the pattern ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease during depressed or decrease ) OR ( decrease theory decrease the pattern ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed or decrease ) OR ( decrease theory decrease the pattern ))*.