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)
coal processing » local processing (Expand search), oil processing (Expand search), dual processing (Expand search)
depressed coal » depressed mood (Expand search), repressed cell (Expand search), depressed to (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)
decrease β » decrease _ (Expand search), decrease in (Expand search), decrease of (Expand search)
β decrease » _ decrease (Expand search), α decrease (Expand search), l 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 coal processing ) OR ( decrease the decrease β decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed coal processing ) OR ( decrease the decrease β decrease ))*.