Perhaps you should try some spelling variations:
"coder detection methods validation problem" » "coder detection method validation problem" (Expand search), "coder detection methods variation problem" (Expand search), "coder detection methods calibration problem" (Expand search), "coder detection methods realization problem" (Expand search), "coder extraction methods validation problem" (Expand search), "code detection methods validation problem" (Expand search), "border detection methods validation problem" (Expand search), "corner detection methods validation problem" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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 detection methods validation problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder detection methods validation problem\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder detection methods validation problem ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder detection methods validation problem") OR ("using coding python python programming"))*.