Perhaps you should try some spelling variations:
"coder precoder mapping of programming" » "coder precise mapping of programming" (Expand search), "coder cover mapping of programming" (Expand search), "coder code mapping of programming" (Expand search), "coder decoder mapping of programming" (Expand search)
"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)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder precoder mapping of programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder mapping of programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder mapping of programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder mapping of programming") OR ("api python python python programming"))*.