Perhaps you should try some spelling variations:
training decreases » training increases (Expand search)
decrease training » increased training (Expand search), disease training (Expand search), release training (Expand search)
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 human » increase human (Expand search), disease human (Expand search), decrease asian (Expand search)
human decrease » human deceased (Expand search), human increase (Expand search), human disease (Expand search)
decreases bio » decreases in (Expand search), decreases hip (Expand search), decreases il (Expand search)
bio objects » bim objects (Expand search), big objects (Expand search), to objects (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 human decrease ) OR ( decrease training decreases bio objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease burden decrease human decrease ) OR ( decrease training decreases bio objects ))*.