Perhaps you should try some spelling variations:
that decrease » that increase (Expand search), that increases (Expand search), not decrease (Expand search)
decrease open » decrease on (Expand search), decrease when (Expand search), decrease owing (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)
decrees that » devices that (Expand search), trees that (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not 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: "(( decrees that decrease open problems ) OR ( decrease rate decrease of decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrees that decrease open problems ) OR ( decrease rate decrease of decrease ))*.