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 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)
work affecting » or affecting (Expand search), loci affecting (Expand search), not affecting (Expand search)
decrease work » decrease or (Expand search), increase work (Expand search), decrease with (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 burden decrease owing decrease ) OR ( decrease of decrease work affecting ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease burden decrease owing decrease ) OR ( decrease of decrease work affecting ))*.