Perhaps you should try some spelling variations:
optimal controller » optimal control (Expand search), logical controller (Expand search), digital controller (Expand search)
decrease decrease » decrease release (Expand search), decreases disease (Expand search), disease decreases (Expand search)
decrease optimal » decrease intimate (Expand search), discrete optimal (Expand search), decrease stigma (Expand search)
decrease after » disease after (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)
decrease at » decrease akt (Expand search), decrease in (Expand search), decrease of (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), not decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease at decrease optimal controller ) OR ( decrease and decrease decrease after ))~.