Perhaps you should try some spelling variations:
decrease caries » decreased cardiac (Expand search), decreases cardiac (Expand search), decreased calorie (Expand search)
caries affected » are affected (Expand search), patients affected (Expand search)
decrease pro » decrease or (Expand search), decrease food (Expand search), decrease treg (Expand search)
pro decrease » to decrease (Expand search), or decrease (Expand search), price decrease (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (Expand search)
decrease il » decreased il (Expand search), decrease in (Expand search), decrease hiv (Expand search)
il decrease » l decrease (Expand search), will decrease (Expand search), oil decreases (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 pro decrease il decrease ) OR ( decrease NOT decrease caries affected ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease pro decrease il decrease ) OR ( decrease not decrease caries affected ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease pro decrease il decrease ) OR ( decrease not decrease caries affected ))*.