Perhaps you should try some spelling variations:
"an introduction _ coding programming" » "an introduction _ solving programming" (Expand search), "an introduction _ cone programming" (Expand search), "an introduction _ conic programming" (Expand search)
"advanced python python coding programming" » "advanced python python solving programming" (Expand search), "advanced python python cone programming" (Expand search), "advanced python python conic programming" (Expand search), "advanced method python coding programming" (Expand search), "advanced path python coding programming" (Expand search), "advanced symphony python coding programming" (Expand search), "advanced pythons python coding programming" (Expand search), "advanced piton python coding programming" (Expand search), "advanced pitons python coding programming" (Expand search), "advanced python action coding programming" (Expand search), "advanced python python code 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: (("an introduction _ coding programming") OR ("advanced python python coding programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"an introduction _ coding programming\") OR (\"advanced python python coding programming\"))".
• Removing quotes may allow a broader search: (( an introduction _ coding programming ) OR ( advanced python python coding programming )).
• Adding a wildcard symbol may retrieve word variants: (("an introduction _ coding programming") OR ("advanced python python coding programming"))*.