Perhaps you should try some spelling variations:
"using computational code variable cost" » "and computational code variable cost" (Expand search), "using computational model variable cost" (Expand search), "using computational cost variable cost" (Expand search), "using computational models variable cost" (Expand search), "using computational mode variable cost" (Expand search), "using computational one variable cost" (Expand search), "using computational more variable cost" (Expand search), "using computational code variable costs" (Expand search), "using computational code variable costing" (Expand search), "using computational code variable control" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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: (("using computational code variable cost") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational code variable cost\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( using computational code variable cost ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using computational code variable cost") OR ("using coding python python programming"))*.