Perhaps you should try some spelling variations:
"coder coding _ introduction problem" » "coder coding _ production problem" (Expand search), "coder coding _ interaction problem" (Expand search), "coder coding _ intersection problem" (Expand search), "modern coding _ introduction problem" (Expand search), "color coding _ introduction problem" (Expand search), "odor coding _ introduction problem" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding _ introduction problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding _ introduction problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding _ introduction problem") OR ("api python python python programming"))*.