Perhaps you should try some spelling variations:
operation processes » operational processes (Expand search), operation process (Expand search), separation processes (Expand search)
decrease operation » decrease cooperation (Expand search), decrease migration (Expand search), decrease predation (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
during decrease » during increased (Expand search), during depressed (Expand search), during disease (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt decrease » and decrease (Expand search), not decrease (Expand search), any decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain 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 in decrease operation processes ) OR ( decrease during decrease akt decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease in decrease operation processes ) OR ( decrease during decrease akt decrease ))*.