Perhaps you should try some spelling variations:
delineate structural » nonlinear structural (Expand search), evaluate structural (Expand search), defensive structural (Expand search)
structural process » structural properties (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
during decrease » during increased (Expand search), during depressed (Expand search), during disease (Expand search)
that delineate » to delineate (Expand search), that deviate (Expand search)
decrease that » decrease the (Expand search), decrease at (Expand search), decrees that (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain 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 that delineate structural process ) OR ( decrease during decrease in decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease that delineate structural process ) OR ( decrease during decrease in decrease ))*.