Perhaps you should try some spelling variations:
optimum processing » optimum pressing (Expand search), minimum processing (Expand search), optical processing (Expand search)
discrete optimum » discrete optimal (Expand search), discrete maximum (Expand search), discrete time (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt discrete » at discrete (Expand search), fast discrete (Expand search), and discrete (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)
on decrease » on decreased (Expand search), of decrease (Expand search), or 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 akt discrete optimum processing ) OR ( decrease to decrease on decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease akt discrete optimum processing ) OR ( decrease to decrease on decrease ))*.