Perhaps you should try some spelling variations:
decrease decrease » decrease release (Expand search), disease decreases (Expand search), decreases disease (Expand search)
vocal projection » local projection (Expand search), local projections (Expand search), vocal production (Expand search)
decrease vocal » decreases local (Expand search), decrease total (Expand search), disease vocal (Expand search)
decrease after » increase after (Expand search), disease after (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 not » decrease of (Expand search), decrease at (Expand search), decrease akt (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (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 NOT decrease vocal projection ) OR ( decrease rate decrease decrease after ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease not decrease vocal projection ) OR ( decrease rate decrease decrease after ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease not decrease vocal projection ) OR ( decrease rate decrease decrease after ))*.