Perhaps you should try some spelling variations:
decrease mortality » decreases mortality (Expand search), decreased mortality (Expand search), increase mortality (Expand search)
mortality based » mortality caused (Expand search), mortality and (Expand search), reality based (Expand search)
decrease owing » decrease lodging (Expand search), decrease during (Expand search), decrease in (Expand search)
owing decrease » taping decrease (Expand search), will decrease (Expand search), skins decrease (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 of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to 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 owing decrease of decrease ) OR ( decrease rate decrease mortality based ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease owing decrease of decrease ) OR ( decrease rate decrease mortality based ))*.