Perhaps you should try some spelling variations:
decrease signal » increased signal (Expand search), decrease stigma (Expand search), decrease renal (Expand search)
signal decrease » signaling decreases (Expand search), signalling decreases (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease high » decreased high (Expand search), decreases high (Expand search), decrease hiv (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)
high pattern » night pattern (Expand search), light pattern (Expand search), with pattern (Expand search)

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

• Removing quotes may allow a broader search: (( decrease and decrease signal decrease ) OR ( decrease rate decrease high pattern ))~.