Perhaps you should try some spelling variations:
"coder estimation methods using problem" » "coder evaluation methods using problem" (Expand search), "model estimation methods using problem" (Expand search), "power estimation methods using problem" (Expand search), "order estimation methods using problem" (Expand search), "coder estimation method using problem" (Expand search), "coder estimation methods used problem" (Expand search), "coder estimation methods housing problems" (Expand search), "coder estimation methods routing problem" (Expand search), "coder estimation methods cutting 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 estimation methods using problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder estimation methods using problem\") OR (\"using coding python python programming\"))*".
• Removing quotes may allow a broader search: (( coder estimation methods using problem ) OR ( using coding python python programming ))*.