Perhaps you should try some spelling variations:
decrease buffering » decrease suffering (Expand search), increased buffering (Expand search), decrease during (Expand search)
buffering effect » buffer effect (Expand search), lowering effect (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
ratio decrease » rate decrease (Expand search), brazil decrease (Expand search), to decrease (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 of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (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 ratio decrease of decrease ) OR ( decrease risk decrease buffering effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease ratio decrease of decrease ) OR ( decrease risk decrease buffering effect ))*.