Perhaps you should try some spelling variations:
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
during decrease » during increased (Expand search), during depressed (Expand search), taping decrease (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
their disease » the disease (Expand search), hair diseases (Expand search)
decrease real » decrease renal (Expand search), decreased renal (Expand search), decreases renal (Expand search)
real effluent » mill effluent (Expand search), an effluent (Expand search), treated effluent (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 decrease their disease ) OR ( decrease _ decrease real effluent ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during decrease their disease ) OR ( decrease _ decrease real effluent ))*.