Perhaps you should try some spelling variations:
decreases burden » decrease burden (Expand search), decreases brown (Expand search), decreases brain (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)
rats decreases » and decreases (Expand search), but decreases (Expand search), stress decreases (Expand search)
burden objects » buried objects (Expand search), wooden objects (Expand search), golden objects (Expand search)
decrease rats » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
decrease via » decrease in (Expand search), decrease hiv (Expand search), decrease il (Expand search)
via decrease » via decreasing (Expand search), urea decrease (Expand search), will 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 via decrease ) OR ( decrease rats decreases burden objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decrease via decrease ) OR ( decrease rats decreases burden objects ))*.