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