Perhaps you should try some spelling variations:
decrease defecation » decreases infection (Expand search), decrease predation (Expand search), decrease cooperation (Expand search)
defecation patterns » defoliation patterns (Expand search), vegetation patterns (Expand search), selection patterns (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)
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)

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 OR decrease ) OR ( decrease human decrease defecation patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decrease OR decrease ) OR ( decrease human decrease defecation patterns ))*.