Perhaps you should try some spelling variations:
decreased functional » increased functional (Expand search), increase functional (Expand search), based functional (Expand search)
functional decrease » functional decline (Expand search), functional cereal (Expand search), functional areas (Expand search)
akt decreased » and decreased (Expand search), are decreased (Expand search), not decreased (Expand search)
decrease akt » decrease at (Expand search), decrease after (Expand search), decrease with (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)
and objects » and object (Expand search), and subjects (Expand search), and objectives (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 akt decreased functional decrease ) OR ( decrease AND decrease AND objects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease akt decreased functional decrease ) OR ( decrease and decrease and objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease akt decreased functional decrease ) OR ( decrease and decrease and objects ))*.