Perhaps you should try some spelling variations:
calculation program » simulation program (Expand search), stimulation program (Expand search), stimulation programs (Expand search)
method calculation » method auscultation (Expand search), methods calibration (Expand search), section calculation (Expand search)
decrease processes » disease processes (Expand search), defense processes (Expand search), decay processes (Expand search)
decrease decrease » decrease release (Expand search), disease decreases (Expand search), decrease sucrose (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease and (Expand search)
on decrease » on decreased (Expand search), or decrease (Expand search), of decrease (Expand search)
python and » python based (Expand search)
and method » and methods (Expand search), based method (Expand search)

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• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease on decrease decrease processes ) OR ( python AND method calculation program ))~.
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