Perhaps you should try some spelling variations:
decrease vegetation » increased vegetation (Expand search), decrease migration (Expand search), dense vegetation (Expand search)
vegetation patterns » migration patterns (Expand search), interaction patterns (Expand search), methylation patterns (Expand search)
decrease after » increase after (Expand search), disease after (Expand search)
after decrease » faster decrease (Expand search), after deceased (Expand search), litter decrease (Expand search)
decrease pain » decreases pain (Expand search), decrease in (Expand search), decreased brain (Expand search)
pain decrease » can decrease (Expand search), taping decrease (Expand search), strain decrease (Expand search)
decrease its » decreases its (Expand search), decrease with (Expand search), decrease in (Expand search)
its decrease » with decrease (Expand search), nts decreases (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 its decrease after decrease ) OR ( decrease pain decrease vegetation patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease its decrease after decrease ) OR ( decrease pain decrease vegetation patterns ))*.