Perhaps you should try some spelling variations:
in preprocessing » in reprocessing (Expand search), and preprocessing (Expand search), via preprocessing (Expand search)
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 the » decreases the (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)
depressed by » repressed by (Expand search), expressed by (Expand search), depressed nk (Expand search)
by decrease » by decreased (Expand search), may decrease (Expand search), any decrease (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 the decrease in preprocessing ) OR ( decrease during depressed by decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decrease in preprocessing ) OR ( decrease during depressed by decrease ))*.