Perhaps you should try some spelling variations:
"using computation by users problem" » "using computational by users problem" (Expand search), "using imputation by users problem" (Expand search), "using compilation by users problem" (Expand search), "using computation of users problem" (Expand search), "using computation _ users problem" (Expand search), "using computation in users problem" (Expand search), "using computation by user problem" (Expand search), "using computation by user problems" (Expand search), "using computation by users profiles" (Expand search), "using computation by use problem" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computation by users problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using computation by users problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computation by users problem") OR ("using coding python python programming"))*.