Perhaps you should try some spelling variations:
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)
and decreased » and decreases (Expand search), and increased (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease il » decreased il (Expand search), decrease in (Expand search), decrease hiv (Expand search)
il object » ocl object (Expand search), gdl object (Expand search), final object (Expand search)

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease costs decrease AND decreased ) OR ( decrease _ decrease il object ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease costs decrease and decreased ) OR ( decrease _ decrease il object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease costs decrease and decreased ) OR ( decrease _ decrease il object ))*.