Perhaps you should try some spelling variations:
disease defense » disease disease (Expand search), disease defined (Expand search), defense defense (Expand search)
defense process » defensive process (Expand search), defense processes (Expand search), defense proteins (Expand search)
decrease human » increase human (Expand search), disease human (Expand search), decrease asian (Expand search)
python study » python estudo (Expand search), python cuda (Expand search)
cell python » cell pathogen (Expand search)
study cell » studying cell (Expand search), study mellat (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 human disease defense process ) OR ( python study cell python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease human disease defense process ) OR ( python study cell python programming ))*.