Perhaps you should try some spelling variations:
"and computational and refractive errors" » "_ computational and refractive errors" (Expand search), "and computational fluid refractive errors" (Expand search), "and computational and reactive errors" (Expand search), "and computational and reflective errors" (Expand search), "and computational and relative errors" (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: "((\"and computational and refractive errors\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( and computational and refractive errors ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computational and refractive errors") OR ("using coding python python programming"))*.