Perhaps you should try some spelling variations:
"by computation and integer programming" » "by computation and linear programming" (Expand search), "by computational and integer programming" (Expand search), "by computation of integer programming" (Expand search), "of computation and integer programming" (Expand search), "_ computation and integer programming" (Expand search), "by computation an integer programming" (Expand search), "by computation and inter programming" (Expand search), "by computation and integral programming" (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 computation and integer programming") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"by computation and integer programming\") OR (\"using python python python programming\"))".
• Removing quotes may allow a broader search: (( by computation and integer programming ) OR ( using python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("by computation and integer programming") OR ("using python python python programming"))*.