Perhaps you should try some spelling variations:
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 costs » decreasing costs (Expand search), decreases post (Expand search), disease costs (Expand search)
costs decrease » loss decrease (Expand search), not decrease (Expand search), cells decrease (Expand search)
decrease speed » decrease need (Expand search), decreased sperm (Expand search), decreases sperm (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)
speed effect » speed effects (Expand search), speed affect (Expand search), speeds affect (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 toc decrease ) OR ( decrease costs decrease speed effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decrease toc decrease ) OR ( decrease costs decrease speed effect ))*.