Perhaps you should try some spelling variations:
training decreases » training increases (Expand search)
decrease training » increased training (Expand search), disease training (Expand search), release training (Expand search)
decrease waking » decrease walking (Expand search), decreases weaning (Expand search), increase walking (Expand search)
decreases risk » decreased risk (Expand search), decrease risk (Expand search), increases risk (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)
waking test » walking test (Expand search), making test (Expand search), walking tests (Expand search)

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

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