Perhaps you should try some spelling variations:
decrease lipid » increases lipid (Expand search), increased lipid (Expand search)
lipid decrease » rapid decrease (Expand search), ligand decrease (Expand search), limb decrease (Expand search)
decrease treg » decrease the (Expand search), increase treg (Expand search), decrease their (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)
treg objects » free objects (Expand search), art objects (Expand search), from objects (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 lipid decrease ) OR ( decrease AND decrease treg objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease hiv decrease lipid decrease ) OR ( decrease AND decrease treg objects ))*.