Perhaps you should try some spelling variations:
"based expression and generalized array" » "based expression and generalized arma" (Expand search), "based expression and generalized airy" (Expand search), "based expression and generalized early" (Expand search), "and expression and generalized array" (Expand search), "based regression and generalized array" (Expand search), "fixed expressions and generalized array" (Expand search), "based expression in generalized array" (Expand search), "based expression _ generalized array" (Expand search)
"using python python python programming" » "using pythons python python programming" (Expand search), "using piton python python programming" (Expand search), "using pitons python python programming" (Expand search), "usando python python python programming" (Expand search), "in 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: "((\"based expression and generalized array\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( based expression and generalized array ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based expression and generalized array") OR ("using python python python programming"))*.