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