Perhaps you should try some spelling variations:
decrease response » decreased response (Expand search), increases response (Expand search), increased response (Expand search)
response decrease » response defense (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (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 oat » decrease at (Expand search), decrease of (Expand search), decrease akt (Expand search)
oat effect » coat effect (Expand search), oat effects (Expand search), out effect (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 AND decrease hiv decrease ) OR ( decrease response decrease oat effect ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decrease hiv decrease ) OR ( decrease response decrease oat effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decrease hiv decrease ) OR ( decrease response decrease oat effect ))*.