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 their » depressed the (Expand search), depressed mother (Expand search), depresses the (Expand search)
their decrease » the decrease (Expand search), their disease (Expand search), the decreased (Expand search)
decrease total » decreased total (Expand search), increase total (Expand search), decrease fetal (Expand search)
total vectors » local vectors (Expand search), normal vectors (Expand search), social vectors (Expand search)
decrease or » decrease of (Expand search), decrease pro (Expand search), decrease toc (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (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 during depressed their decrease ) OR ( decrease OR decrease total vectors ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease during depressed their decrease ) OR ( decrease or decrease total vectors ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed their decrease ) OR ( decrease or decrease total vectors ))*.