Perhaps you should try some spelling variations:
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
unit processing » nut processing (Expand search), fruit processing (Expand search), input processing (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), disease during (Expand search)
decrease unit » decrease in (Expand search), decrease and (Expand search), decrease with (Expand search)
depressed not » depressed nnos (Expand search), depressed nk (Expand search), depressed to (Expand search)
not decrease » not increase (Expand search), and decrease (Expand search), _ decrease (Expand search)
decrease to » decrease toc (Expand search), decreased to (Expand search), decrease the (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 to decrease unit processing ) OR ( decrease during depressed NOT decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease to decrease unit processing ) OR ( decrease during depressed not decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease to decrease unit processing ) OR ( decrease during depressed not decrease ))*.