Perhaps you should try some spelling variations:
further decrease » further increase (Expand search), faster decrease (Expand search), the decrease (Expand search)
disease further » decrease further (Expand search), disease fourth (Expand search), disorder further (Expand search)
decrease mask » decrease risk (Expand search), decrease milk (Expand search), decreased base (Expand search)
mask object » mass objects (Expand search), dark object (Expand search), based object (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: "(( disease further decrease AND decrease ) OR ( decrease OR decrease mask object ))~".
• Adding a wildcard symbol may retrieve word variants: (( disease further decrease AND decrease ) OR ( decrease OR decrease mask object ))*.