Perhaps you should try some spelling variations:
"python python python python programming" » "pythons python pythons python programming" (Expand search), "piton python piton python programming" (Expand search), "pitons python pitons python programming" (Expand search)
"code coding in parallel programming" » "code cloning in parallel programming" (Expand search), "code codigo in parallel programming" (Expand search), "code according in parallel programming" (Expand search), "code coding _ parallel programming" (Expand search), "code coding of parallel programming" (Expand search), "code coding rna parallel programming" (Expand search), "code coding and parallel 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: "((\"code coding in parallel programming\") OR (\"python python python python programming\"))~".
• Removing quotes may allow a broader search: (( code coding in parallel programming ) OR ( python python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("code coding in parallel programming") OR ("python python python python programming"))*.