Perhaps you should try some spelling variations:
"and computation using locking problem" » "and computations using locking problem" (Expand search), "and computation in locking problem" (Expand search), "and composition using locking problem" (Expand search), "and computational using locking problem" (Expand search), "of computation using locking problem" (Expand search), "and computation using docking problem" (Expand search), "and computation using packing problem" (Expand search), "and computation using loading problem" (Expand search), "and computation using stacking problem" (Expand search), "and computation using tracking problem" (Expand search), "and computation swing blocking problem" (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.

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