Perhaps you should try some spelling variations:
the preprocessing » the processing (Expand search), their processing (Expand search), image preprocessing (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decreased il » decreased in (Expand search), increased il (Expand search), decreased risk (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (Expand search)
il decrease » l decrease (Expand search), will decrease (Expand search), oil decreases (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: "(( decreased il decrease the preprocessing ) OR ( decrease rate decrease can decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased il decrease the preprocessing ) OR ( decrease rate decrease can decrease ))*.