Perhaps you should try some spelling variations:
"by computational using bootstrap problem" » "by computation using bootstrap problem" (Expand search), "by computations using bootstrap problem" (Expand search), "by computacional usinas bootstrap problem" (Expand search), "by computational using bootstrap programa" (Expand search), "_ computational using bootstrap problem" (Expand search), "and computational using bootstrap problem" (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.

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