Perhaps you should try some spelling variations:
"coder decoder java learning problem" » "coder decoder java learning problems" (Expand search), "coder decoder java planning problem" (Expand search), "coder decoder java learning program" (Expand search), "encoder decoder java learning problem" (Expand search), "coder decoder data learning problem" (Expand search), "coder decoder meta learning problem" (Expand search), "coder decoder via learning problem" (Expand search), "coder codes java learning problem" (Expand search), "coder xcode java learning problem" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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 decoder java learning problem") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder java learning problem\") OR (\"using codigo python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder java learning problem ) OR ( using codigo python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder java learning problem") OR ("using codigo python python programming"))*.