Perhaps you should try some spelling variations:
decrease fear » decreased fear (Expand search), decrease fetal (Expand search), decreased heart (Expand search)
fear decrease » break decrease (Expand search), merr decreases (Expand search), can decrease (Expand search)
decrease that » decrease at (Expand search), decrees that (Expand search), decree that (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not decrease (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 the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the atom » the atomic (Expand search), the atp (Expand search), the at1 (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 decrease fear decrease ) OR ( decrease that decrease the atom ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease hiv decrease fear decrease ) OR ( decrease that decrease the atom ))*.