Perhaps you should try some spelling variations:
"coder functioning in variational problem" » "coder functioning in variational problems" (Expand search), "models functioning in variational problem" (Expand search), "proper functioning in variational problem" (Expand search), "role functioning in variational problem" (Expand search), "coder functioning of variational problem" (Expand search), "coder functioning on variational problem" (Expand search), "coder functioning and variational problem" (Expand search), "coder functioning via variational 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder functioning in variational problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( coder functioning in variational problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder functioning in variational problem") OR ("using coding python python programming"))*.