Perhaps you should try some spelling variations:
decrease reducing » decrease replacing (Expand search), decrease during (Expand search), disease reducing (Expand search)
reducing effect » inducing effect (Expand search), reduction effect (Expand search), reduction effects (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)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt decrease » and decrease (Expand search), not decrease (Expand search), any decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease risk decrease risk decrease ) OR ( decrease akt decrease reducing effect ))~.