Perhaps you should try some spelling variations:
"and computational using dirac problem" » "and computation using dirac problem" (Expand search), "and computations using dirac problem" (Expand search), "and computacional usinas dirac problem" (Expand search), "_ computational using dirac problem" (Expand search), "and computational using direct problem" (Expand search), "and computational using dic problem" (Expand search), "and computational using ddrad 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("and computational using dirac problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computational using dirac problem\") OR (\"using coding python python programming\"))*".
• Removing quotes may allow a broader search: (( and computational using dirac problem ) OR ( using coding python python programming ))*.