Perhaps you should try some spelling variations:
"by computation using locking problems" » "by computations using locking problems" (Expand search), "by computation in locking problems" (Expand search), "by composition using locking problems" (Expand search), "by computation using packing problems" (Expand search), "by computation using loading problems" (Expand search), "by computation using docking problem" (Expand search), "by computational using locking problems" (Expand search), "of computation using locking problems" (Expand search), "_ computation using locking problems" (Expand search), "by computation using stacking problems" (Expand search), "by computation using tracking problems" (Expand search), "by computation swing blocking problems" (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: "((\"by computation using locking problems\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( by computation using locking problems ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("by computation using locking problems") OR ("using python python python programming"))*.