Perhaps you should try some spelling variations:
disease changes » disease chagas (Expand search), disease challenges (Expand search), disease stages (Expand search)
changes process » change process (Expand search), changes processes (Expand search), exchanges process (Expand search)
decrease spot » decrease sod (Expand search), decrease soon (Expand search), decrease of (Expand search)
spot disease » host disease (Expand search), wilt disease (Expand search)
python code » python coding (Expand search), python redes (Expand search)
and python » in python (Expand search), on python (Expand search), api python (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease spot disease changes process ) OR ( python code AND python programming ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease spot disease changes process ) OR ( python code and python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease spot disease changes process ) OR ( python code and python programming ))*.