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)
python vector » pathogen vector (Expand search), motion vector (Expand search), python tutor (Expand search)
vector method » vector meson (Expand search), error method (Expand search)
method python » method method (Expand search), python python (Expand search)
decrease may » decrease at (Expand search), decrease by (Expand search), decrease human (Expand search)
may decrease » may increase (Expand search), can decrease (Expand search), to decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease may decrease defense processes ) OR ( python vector method python programming ))~.