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)
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 soon » decrease food (Expand search), decrease on (Expand search), decrease sod (Expand search)
soon pattern » on pattern (Expand search), sign pattern (Expand search), motion pattern (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 burden decrease NOT decrease ) OR ( decrease rate decrease soon pattern ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease burden decrease NOT decrease ) OR ( decrease rate decrease soon pattern ))*.