Perhaps you should try some spelling variations:
decrease burden » disease burden (Expand search), decrease further (Expand search)
burden decrease » burden disease (Expand search), urea decrease (Expand search), burgers decreases (Expand search)
decreased rate » increased rate (Expand search), decreased base (Expand search), decreased native (Expand search)
decrease actor » decrease after (Expand search), decreased after (Expand search), decreases motor (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)
actor object » action object (Expand search), alter object (Expand search), actor subjects (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: "(( decreased rate decrease can decrease ) OR ( decrease burden decrease actor object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased rate decrease can decrease ) OR ( decrease burden decrease actor object ))*.