Perhaps you should try some spelling variations:
costs decreased » cross decreased (Expand search), causes decreased (Expand search), not decreased (Expand search)
decrease costs » decreasing costs (Expand search), decreases post (Expand search), disease costs (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), and decrease (Expand search)
their objects » the objects (Expand search), their objectives (Expand search), their projects (Expand search)
decreased to » decreased the (Expand search), decreased tgf (Expand search), decreased in (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 costs decreased to decrease ) OR ( decrease rate decrease their objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease costs decreased to decrease ) OR ( decrease rate decrease their objects ))*.