Perhaps you should try some spelling variations:
"coder authentication on coding problem" » "coffee authentication on coding problem" (Expand search), "user authentication on coding problem" (Expand search), "honey authentication on coding problem" (Expand search), "coder authentication of coding problem" (Expand search), "coder authentication in coding problem" (Expand search), "coder authentication and coding problem" (Expand search), "coder authentication on coding problems" (Expand search), "coder authentication on coping problem" (Expand search), "coder authentication on loading problem" (Expand search), "coder authentication non coding 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.

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