Perhaps you should try some spelling variations:
defense processes » defense process (Expand search), decrease processes (Expand search), disease processes (Expand search)
decrease defense » defense defense (Expand search), decrease release (Expand search), decreases disease (Expand search)
ratio decrease » to decrease (Expand search), rats decreases (Expand search)
python based » action based (Expand search)
petri python » piton python (Expand search), pytm python (Expand search)
based petri » based metric (Expand search), based peer (Expand search), based metrics (Expand search)
node » nove (Expand search), nome (Expand search), none (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( node ratio decrease defense processes ) OR ( python based petri python programming ))~.