Perhaps you should try some spelling variations:
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python python programming" (Expand search)
"coder coder cplexr parallel programming" » "coder decoder cplexr parallel programming" (Expand search), "code code cplexr parallel programming" (Expand search), "decoder codec cplexr parallel programming" (Expand search), "coder coder cplex parallel programming" (Expand search), "coder coder cplear parallel programming" (Expand search), "coder coder complexr parallel 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: (("coder coder cplexr parallel programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder cplexr parallel programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder cplexr parallel programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder cplexr parallel programming") OR ("_ python python python programming"))*.