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 sound » decrease sod (Expand search), decrease soon (Expand search), decrease and (Expand search)
decrease will » decrease with (Expand search), decrease cell (Expand search), decrease il (Expand search)
sound objects » and objects (Expand search), sound effects (Expand search), boundary objects (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (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 their decrease will decrease ) OR ( decrease of decrease sound objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decrease will decrease ) OR ( decrease of decrease sound objects ))*.