Perhaps you should try some spelling variations:
"coder on complexity data problems" » "coder on complexity at problems" (Expand search), "coder on complexity and problems" (Expand search), "coder on complexity an problems" (Expand search), "coder and complexity data problems" (Expand search), "coder _ complexity data problems" (Expand search), "code on complexity data problems" (Expand search), "codes on complexity data problems" (Expand search), "powder on complexity data problems" (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 on complexity data problems") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder on complexity data problems\") OR (\"using coding python python programming\"))*".
• Removing quotes may allow a broader search: (( coder on complexity data problems ) OR ( using coding python python programming ))*.