Perhaps you should try some spelling variations:
optimal preprocessing » optical processing (Expand search), spectral preprocessing (Expand search), data preprocessing (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
disease optimal » disease animal (Expand search), lipase optimal (Expand search), disease maximal (Expand search)
during disease » urine disease (Expand search), ring disease (Expand search), using disease (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)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to 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 during disease optimal preprocessing ) OR ( decrease can decrease of decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during disease optimal preprocessing ) OR ( decrease can decrease of decrease ))*.