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)
during decrease » during increased (Expand search), during depressed (Expand search), during disease (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can discrete » chain discrete (Expand search), in discrete (Expand search), and discrete (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)
on increase » on increased (Expand search), an increase (Expand search), in increase (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 can discrete optimum processing ) OR ( decrease on increase during decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease can discrete optimum processing ) OR ( decrease on increase during decrease ))*.