Perhaps you should try some spelling variations:
the preprocessing » the processing (Expand search), their processing (Expand search), image preprocessing (Expand search)
decrease rapid » decrease lipid (Expand search), decreased ratio (Expand search), decrease and (Expand search)
rapid decrease » rapidly decrease (Expand search), rapid increase (Expand search), ratio decrease (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease may » decrease at (Expand search), decrease by (Expand search), decrease human (Expand search)
may decrease » may increase (Expand search), can decrease (Expand search), to decrease (Expand search)
or decrease » not decrease (Expand search), to decrease (Expand search), _ decrease (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease pro (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 rapid decrease the preprocessing ) OR ( decrease may decrease OR decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease rapid decrease the preprocessing ) OR ( decrease may decrease or decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease rapid decrease the preprocessing ) OR ( decrease may decrease or decrease ))*.