Perhaps you should try some spelling variations:
stress decreases » stress increases (Expand search)
decrease stress » decreases stress (Expand search), increase stress (Expand search), disease stress (Expand search)
decrease treg » decrease the (Expand search), increase treg (Expand search), decrease their (Expand search)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs decrease (Expand search)
decrease by » decreased by (Expand search), decrease in (Expand search), decrease of (Expand search)
by objects » by object (Expand search), bim objects (Expand search), big 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 stress decreases AND decrease ) OR ( decrease treg decrease by objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease stress decreases AND decrease ) OR ( decrease treg decrease by objects ))*.