Perhaps you should try some spelling variations:
structure process » structural process (Expand search), structural processes (Expand search), structure property (Expand search)
phrase structure » phase structure (Expand search), frame structure (Expand search), age structure (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt phrase » and phrase (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 akt phrase structure process ) OR ( decrease _ decrease rate decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease akt phrase structure process ) OR ( decrease _ decrease rate decrease ))*.