Perhaps you should try some spelling variations:
"coder coder string cutting problem" » "coder coder string routing problem" (Expand search), "coder coder string covering problem" (Expand search), "coder coder sowing cutting problem" (Expand search), "coder coder during cutting problem" (Expand search), "coder coder stenting cutting problem" (Expand search), "coder cordel string cutting problem" (Expand search), "coder closed string cutting problem" (Expand search), "coder modelo string cutting problem" (Expand search), "coder decoder string cutting problem" (Expand search), "code code string cutting problem" (Expand search), "decoder codec string cutting 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 string cutting problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder string cutting problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder string cutting problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder string cutting problem") OR ("_ python python python programming"))*.