Perhaps you should try some spelling variations:
"coder code _ triangular problems" » "coder code _ singular problems" (Expand search), "coder code _ triangle problems" (Expand search), "coder code _ triangular process" (Expand search), "code code _ triangular problems" (Expand search), "modern code _ triangular problems" (Expand search), "color code _ triangular 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 code _ triangular problems") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder code _ triangular problems\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder code _ triangular problems ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder code _ triangular problems") OR ("using coding python python programming"))*.