Perhaps you should try some spelling variations:
"using computational testing based problems" » "using compositional testing based problems" (Expand search), "using computational tests based problems" (Expand search), "using computational tinking based problems" (Expand search), "and computational testing based problems" (Expand search), "using computational testing posed problems" (Expand search), "using computational testing based probes" (Expand search), "using computational testing basic problems" (Expand search), "using computational test based problems" (Expand search), "using computational coating based problems" (Expand search), "using computational reading based problems" (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 computational testing based problems\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using computational testing based problems ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational testing based problems") OR ("using coding python python programming"))*.