Perhaps you should try some spelling variations:
decreased rate » increased rate (Expand search), decreased base (Expand search), decreased native (Expand search)
hiv decreased » have decreased (Expand search), is decreased (Expand search), in decreased (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease disk » decrease risk (Expand search), decreased risk (Expand search), decrease milk (Expand search)
decrease hiv » decrease in (Expand search), decrease their (Expand search), decreased high (Expand search)
disk object » dark object (Expand search), mask object (Expand search), task object (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 hiv decreased rate decrease ) OR ( decrease AND decrease disk object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease hiv decreased rate decrease ) OR ( decrease AND decrease disk object ))*.