Perhaps you should try some spelling variations:
decrease observed » decay observed (Expand search), case observed (Expand search)
decrease taping » decrease walking (Expand search), decrease during (Expand search), decrease owing (Expand search)
taping decrease » training decreases (Expand search)
observed object » observed effects (Expand search)
decreases and » decreases in (Expand search), decreases _ (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), _ decrease (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (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 the decrease taping decrease ) OR ( decreases AND decrease observed object ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease the decrease taping decrease ) OR ( decreases and decrease observed object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decrease taping decrease ) OR ( decreases and decrease observed object ))*.