Perhaps you should try some spelling variations:
decrease mating » decrease walking (Expand search), decrease during (Expand search), decrease owing (Expand search)
mating patterns » eating patterns (Expand search), banding patterns (Expand search), changing patterns (Expand search)
decrease costs » decreasing costs (Expand search), decreases post (Expand search), disease costs (Expand search)
costs decrease » loss decrease (Expand search), not decrease (Expand search), cells 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 decrease » to decrease (Expand search), and 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 hiv decrease the decrease ) OR ( decrease costs decrease mating patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease hiv decrease the decrease ) OR ( decrease costs decrease mating patterns ))*.