Perhaps you should try some spelling variations:
decrease burden » disease burden (Expand search), decrease further (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
their decrease » the decrease (Expand search), their disease (Expand search), the decreased (Expand search)
burden objects » buried objects (Expand search), wooden objects (Expand search), golden objects (Expand search)
decrease limb » decrease lipid (Expand search), decrease liver (Expand search), decrease in (Expand search)
limb decrease » will decrease (Expand search)
decrease that » decrease the (Expand search), decrease at (Expand search), decrees that (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not 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 their decrease limb decrease ) OR ( decrease that decrease burden objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decrease limb decrease ) OR ( decrease that decrease burden objects ))*.