Perhaps you should try some spelling variations:
execution procedure » extraction procedure (Expand search), execution process (Expand search), execution proceedings (Expand search)
decrease execution » decree execution (Expand search), case execution (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), any decrease (Expand search), salt decreases (Expand search)
decrease not » decrease of (Expand search), decrease at (Expand search), decrease on (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and 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 during decrease execution procedure ) OR ( decrease akt decrease NOT decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease during decrease execution procedure ) OR ( decrease akt decrease not decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during decrease execution procedure ) OR ( decrease akt decrease not decrease ))*.