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)
decrease burden » disease burden (Expand search), decrease further (Expand search)
burden decrease » burden disease (Expand search), urea decrease (Expand search), burgers decreases (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
python sparse » method sparse (Expand search)
sparse based » space based (Expand search), sucrose based (Expand search), agarose based (Expand search)
program » programa (Expand search)

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

• Removing quotes may allow a broader search: (( decrease burden decrease defense processes ) OR ( python python sparse based program ))~.