Perhaps you should try some spelling variations:
"coder coding teaching sparse coding" » "coder cloning teaching sparse coding" (Expand search), "coder doing teaching sparse coding" (Expand search), "coder modeling teaching sparse coding" (Expand search), "coder coding teaching space coding" (Expand search), "coder coding teaching spanish coding" (Expand search), "coder coding teaching course coding" (Expand search), "modern coding teaching sparse coding" (Expand search), "color coding teaching sparse coding" (Expand search), "odor coding teaching sparse coding" (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), "rpa python 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 coding teaching sparse coding") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding teaching sparse coding\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coding teaching sparse coding ) OR ( api python python python programming ))*.