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)
decrease owing » decrease lodging (Expand search), decrease in (Expand search), decrease with (Expand search)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)
owing test » wing test (Expand search), aging test (Expand search), ring test (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 during depressed treg decrease ) OR ( decrease to decrease owing test ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed treg decrease ) OR ( decrease to decrease owing test ))*.