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), disease 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 can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » and decrease (Expand search), can increase (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.

• Removing quotes may allow a broader search: (( decrease during depressed tree processing ) OR ( decrease can decrease to decrease ))~.