Perhaps you should try some spelling variations:
"coder coding makefile parallel programming" » "coder coding massive parallel programming" (Expand search), "modern coding makefile parallel programming" (Expand search), "color coding makefile parallel programming" (Expand search), "odor coding makefile parallel programming" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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: "((\"coder coding makefile parallel programming\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding makefile parallel programming ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding makefile parallel programming") OR ("_ python python python programming"))*.