Perhaps you should try some spelling variations:
"lower order models python software" » "lower order models within software" (Expand search), "lower order models pixton software" (Expand search), "lower order modulo python software" (Expand search), "lower order modeling vpython software" (Expand search), "lower order model python software" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ python python python programming" (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: "((\"lower order models python software\") OR (\"in python python python programming\"))~".
• Removing quotes may allow a broader search: (( lower order models python software ) OR ( in python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("lower order models python software") OR ("in python python python programming"))*.