Perhaps you should try some spelling variations:
vibration decreases » maturation decreases (Expand search), starvation decreases (Expand search), vegetation decreases (Expand search)
decrease vibration » decrease migration (Expand search), disease vibration (Expand search), decrease predation (Expand search)
risk processing » milk processing (Expand search), rock processing (Expand search), desk processing (Expand search)
decreases risk » decreased risk (Expand search), decrease risk (Expand search), increases risk (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (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)

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 vibration decreases risk processing ) OR ( decrease toc decrease AND decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease vibration decreases risk processing ) OR ( decrease toc decrease and decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease vibration decreases risk processing ) OR ( decrease toc decrease and decrease ))*.