Perhaps you should try some spelling variations:
ratio decreased » ratio decrease (Expand search), rats decreased (Expand search), to decreased (Expand search)
time processing » the processing (Expand search), image processing (Expand search), pre processing (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
decreased time » decreased the (Expand search), decreased native (Expand search), decreased tumor (Expand search)
decrease hiv » decrease in (Expand search), decrease their (Expand search), decreased high (Expand search)
hiv decrease » via decrease (Expand search), hiv increase (Expand search), will 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease ratio decreased time processing ) OR ( decrease hiv decrease akt decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease ratio decreased time processing ) OR ( decrease hiv decrease akt decrease ))*.