Perhaps you should try some spelling variations:
"and computation using matrix program" » "and computations using matrix program" (Expand search), "and computation in matrix program" (Expand search), "and composition using matrix program" (Expand search), "and computational using matrix program" (Expand search), "of computation using matrix program" (Expand search), "and computation using matrix prova" (Expand search), "and computation using maldi program" (Expand search), "and computation using matlab program" (Expand search)
"using python python python programming" » "using pythons python python programming" (Expand search), "using piton python python programming" (Expand search), "using pitons python python programming" (Expand search), "usando python python python programming" (Expand search), "in python 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 computation using matrix program") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computation using matrix program\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( and computation using matrix program ) OR ( using python python python programming ))*.