Perhaps you should try some spelling variations:
reactive objects » fictive objects (Expand search), reactive effects (Expand search), reaching objects (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease in (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
to decreased » to decrease (Expand search), to increased (Expand search), is decreased (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (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 of decrease risk decrease ) OR ( decrease to decreased reactive objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of decrease risk decrease ) OR ( decrease to decreased reactive objects ))*.