Perhaps you should try some spelling variations:
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
decrease term » decreased sperm (Expand search), decreases sperm (Expand search), decrease theory (Expand search)
term decrease » term increase (Expand search), to decrease (Expand search), the decrease (Expand search)
their objects » the objects (Expand search), their objectives (Expand search), their projects (Expand search)
decrease hiv » decrease in (Expand search), decreased high (Expand search), decrease with (Expand search)
hiv decrease » via decrease (Expand search), hiv increase (Expand search), will 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 NOT decrease term decrease ) OR ( decrease hiv decrease their objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease NOT decrease term decrease ) OR ( decrease hiv decrease their objects ))*.