Perhaps you should try some spelling variations:
depressed seismic » derived seismic (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)
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)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease during depressed seismic processing ) OR ( decrease can decrease OR decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed seismic processing ) OR ( decrease can decrease OR decrease ))*.