Perhaps you should try some spelling variations:
ratio decreases » ratio decrease (Expand search), rats decreases (Expand search), ratio increases (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
decreases and » decreases in (Expand search), decreases _ (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)
decrease akt » decrease at (Expand search), decrease after (Expand search), decrease with (Expand search)
akt decrease » not decrease (Expand search), any decrease (Expand search), salt decreases (Expand search)
decrease and » decrease in (Expand search), decrease of (Expand search), decrease the (Expand search)
and objects » and object (Expand search), and subjects (Expand search), and objectives (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease ratio decreases and decrease ) OR ( decrease akt decrease and objects ))~.