Perhaps you should try some spelling variations:
"coder coder valued propositional problem" » "coder coder value proposition problem" (Expand search), "coder coder value propositions problem" (Expand search), "coder coder and propositional problem" (Expand search), "coder under valued propositional problem" (Expand search), "coder order value propositional problem" (Expand search), "coder four valued propositional problem" (Expand search), "coder decoder valued propositional problem" (Expand search), "code code valued propositional problem" (Expand search), "decoder codec valued propositional problem" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 valued propositional problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder valued propositional problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder valued propositional problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder valued propositional problem") OR ("_ python python python programming"))*.