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)
tree processing » three processing (Expand search), green processing (Expand search), puree processing (Expand search)
depressed tree » depressed the (Expand search), depressed area (Expand search), depressed areas (Expand search)
decrease at » decrease akt (Expand search), decrease and (Expand search), decrease in (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and 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 during depressed tree processing ) OR ( decrease OR decrease at decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed tree processing ) OR ( decrease OR decrease at decrease ))*.