Perhaps you should try some spelling variations:
decrease soil » decreases soil (Expand search), increase soil (Expand search), decrease il (Expand search)
soil increase » oil increase (Expand search), oil increases (Expand search), soil decrease (Expand search)
increase with » increases with (Expand search)
with decrease » with decreased (Expand search), with deceased (Expand search), with increase (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease pro (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
akt object » art object (Expand search), art objects (Expand search), iot object (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 soil increase with decrease ) OR ( decrease OR decrease akt object ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease soil increase with decrease ) OR ( decrease or decrease akt object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease soil increase with decrease ) OR ( decrease or decrease akt object ))*.