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