Perhaps you should try some spelling variations:
"coder coder _ triangular problem" » "coder coder _ singular problem" (Expand search), "coder coder _ triangle problem" (Expand search), "coder coder _ triangulation problem" (Expand search), "coder decoder _ triangular problem" (Expand search), "code code _ triangular problem" (Expand search), "decoder codec _ triangular problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python 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 coder _ triangular problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder _ triangular problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder _ triangular problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder _ triangular problem") OR ("api python python python programming"))*.