Perhaps you should try some spelling variations:
"random regression using generalized array" » "random regression in generalized array" (Expand search), "random regression and generalized array" (Expand search), "random regression on generalized array" (Expand search), "random regression using generalized arma" (Expand search), "random regression using generalized airy" (Expand search), "random regression using generalized early" (Expand search), "random regression testing generalized array" (Expand search), "random expression using generalized array" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("random regression using generalized array") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"random regression using generalized array\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( random regression using generalized array ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("random regression using generalized array") OR ("in python python python programming"))*.