Perhaps you should try some spelling variations:
decrease venation » decrease predation (Expand search), decrease prevention (Expand search), decrease migration (Expand search)
venation patterns » vegetation patterns (Expand search), defecation patterns (Expand search), migration patterns (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)

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 AND decrease NOT decrease ) OR ( decrease rate decrease venation patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease AND decrease NOT decrease ) OR ( decrease rate decrease venation patterns ))*.