Perhaps you should try some spelling variations:
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
semen processing » semantic processing (Expand search), soybean processing (Expand search), grain processing (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
decrease semen » decreased semen (Expand search), decrease human (Expand search), decrease need (Expand search)
depressed and » expressed and (Expand search), oppressed and (Expand search), depression and (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (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 to decrease semen processing ) OR ( decrease during depressed AND decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease to decrease semen processing ) OR ( decrease during depressed and decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease to decrease semen processing ) OR ( decrease during depressed and decrease ))*.