Perhaps you should try some spelling variations:
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
depressed treg » depressed the (Expand search), depressed area (Expand search), depressed areas (Expand search)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs 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 on » decrease in (Expand search), decrease of (Expand search), decrease or (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 NOT decrease on process ) OR ( decrease during depressed treg decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease not decrease on process ) OR ( decrease during depressed treg decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease not decrease on process ) OR ( decrease during depressed treg decrease ))*.