Perhaps you should try some spelling variations:
"coder authentication _ coding problems" » "coffee authentication _ coding problems" (Expand search), "user authentication _ coding problems" (Expand search), "layer authentication _ coding problems" (Expand search), "coder authentication _ loading problems" (Expand search), "coder authentication _ counting problems" (Expand search), "coder authentication _ covering problems" (Expand search)
"python coding python python programming" » "python codigo python python programming" (Expand search), "action coding python python programming" (Expand search), "python code python python programming" (Expand search), "python codigos python python programming" (Expand search), "python using python python programming" (Expand search), "python coding pythons python programming" (Expand search), "python coding piton python programming" (Expand search), "python coding pitons 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 authentication _ coding problems\") OR (\"python coding python python programming\"))~".
• Removing quotes may allow a broader search: (( coder authentication _ coding problems ) OR ( python coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder authentication _ coding problems") OR ("python coding python python programming"))*.