Perhaps you should try some spelling variations:
"coder functions tests and problem" » "power functions tests and problem" (Expand search), "order functions tests and problem" (Expand search), "colour functions tests and problem" (Expand search), "coder function tests and problem" (Expand search), "coder functional tests and problem" (Expand search), "coder function test and 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 functions tests and problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder functions tests and problem\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder functions tests and problem ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder functions tests and problem") OR ("using coding python python programming"))*.