Perhaps you should try some spelling variations:
decrease clogging » decrease lodging (Expand search), decrease flooding (Expand search), decrease owing (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)
clogging effect » logging affect (Expand search), loading effect (Expand search), cooling effect (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)
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)

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 NOT decrease during decrease ) OR ( decrease akt decrease clogging effect ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease not decrease during decrease ) OR ( decrease akt decrease clogging effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease not decrease during decrease ) OR ( decrease akt decrease clogging effect ))*.