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 focal » decreases local (Expand search), decrease fetal (Expand search), decrease total (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), to decrease (Expand search)
focal objects » social objects (Expand search), local object (Expand search), real objects (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 NOT decrease ) OR ( decrease rate decrease focal objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decrease NOT decrease ) OR ( decrease rate decrease focal objects ))*.