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), during disease (Expand search)
decrease owing » decrease lodging (Expand search), decrease in (Expand search), decrease with (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease by » decreased by (Expand search), decrease in (Expand search), decrease of (Expand search)
by decrease » by decreased (Expand search), may decrease (Expand search), any decrease (Expand search)
owing field » growing field (Expand search), using field (Expand search), wind field (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 by decrease rate decrease ) OR ( decrease during decrease owing field ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease by decrease rate decrease ) OR ( decrease during decrease owing field ))*.