Perhaps you should try some spelling variations:
that decrease » that increase (Expand search), that increases (Expand search), can decrease (Expand search)
decrease hiv » decrease in (Expand search), decrease their (Expand search), decreased high (Expand search)
decrees that » devices that (Expand search), trees that (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the affected » are affected (Expand search), the affective (Expand search), area affected (Expand search)
hiv decrees » that decrees (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease hiv decrees that decrease ) OR ( decrease NOT decrease the affected ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease hiv decrees that decrease ) OR ( decrease not decrease the affected ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease hiv decrees that decrease ) OR ( decrease not decrease the affected ))*.