Perhaps you should try some spelling variations:
"coder coder the covering problem" » "coder coder the routing problem" (Expand search), "coder coder the loading problem" (Expand search), "coder coder the coverage problem" (Expand search), "coder coder the cover problem" (Expand search), "coder coder the covers problem" (Expand search), "coder decoder the covering problem" (Expand search), "code code the covering problem" (Expand search), "decoder codec the covering problem" (Expand search), "coder code the covering problem" (Expand search), "coder cover the covering problem" (Expand search), "coder poder the covering problem" (Expand search)
"monty python python python programming" » "monty pythons python python programming" (Expand search), "monty piton python python programming" (Expand search), "monty 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 the covering problem") OR ("monty python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder the covering problem\") OR (\"monty python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder the covering problem ) OR ( monty python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder the covering problem") OR ("monty python python python programming"))*.