Perhaps you should try some spelling variations:
and preprocessing » and reprocessing (Expand search), based preprocessing (Expand search), data 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 its » decreases its (Expand search), decrease its (Expand search), decreased with (Expand search)
decrease and » decreases and (Expand search), decrease of (Expand search), decrease the (Expand search)
in decreased » is decreased (Expand search), in deceased (Expand search), and decreased (Expand search)
its decrease » with decrease (Expand search), nts decreases (Expand search), to decrease (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease rate decrease AND preprocessing ) OR ( decrease in decreased its decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease rate decrease and preprocessing ) OR ( decrease in decreased its decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease rate decrease and preprocessing ) OR ( decrease in decreased its decrease ))*.