Perhaps you should try some spelling variations:
"fixed regression in parallel programing" » "fixed regression in parallel programming" (Expand search), "fixed regression in parallel programs" (Expand search), "fixed regression in parallel processing" (Expand search), "mixed regression in parallel programing" (Expand search), "and regression in parallel programing" (Expand search), "fixed regression and parallel programing" (Expand search), "fixed regression _ parallel programing" (Expand search), "fixed regression of parallel programing" (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)

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