Perhaps you should try some spelling variations:
decrease observed » decay observed (Expand search), case observed (Expand search)
decrease lodging » decrease walking (Expand search)
lodging decrease » logging decreases (Expand search), loading decreased (Expand search), taping decrease (Expand search)
observed pattern » observer pattern (Expand search), observed after (Expand search), observed water (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)
decreased to » decreased the (Expand search), decreased tgf (Expand search), decreased in (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease lodging decrease during decrease ) OR ( decreased to decrease observed pattern ))~.