Perhaps you should try some spelling variations:
decrease learning » increases learning (Expand search), decreases weaning (Expand search), defense learning (Expand search)
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)
learning object » learning objects (Expand search)
depressed urea » depressed area (Expand search), depressed areas (Expand search), depressed the (Expand search)
urea decrease » urea increases (Expand search), the decrease (Expand search), or decrease (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » can increase (Expand search), and decrease (Expand search), to decrease (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 urea decrease ) OR ( decrease can decrease learning object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed urea decrease ) OR ( decrease can decrease learning object ))*.