Perhaps you should try some spelling variations:
their decrease » the decrease (Expand search), their disease (Expand search), the decreased (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
decrease costs » decreasing costs (Expand search), decreases post (Expand search), disease costs (Expand search)
costs objects » cost objects (Expand search), lost objects (Expand search), postal objects (Expand search)
in decreased » is decreased (Expand search), in deceased (Expand search), and decreased (Expand search)
decreased at » decreased akt (Expand search), decreased ant (Expand search), decrease at (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and 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 in decreased at decrease ) OR ( decrease their decrease costs objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease in decreased at decrease ) OR ( decrease their decrease costs objects ))*.