Perhaps you should try some spelling variations:
"coder coder string packing problem" » "coder coder string planning problem" (Expand search), "coder coder strip packing problem" (Expand search), "coder coder string matching problem" (Expand search), "coder coder string teaching problem" (Expand search), "coder cordel string packing problem" (Expand search), "coder closed string packing problem" (Expand search), "coder modelo string packing problem" (Expand search), "coder decoder string packing problem" (Expand search), "code code string packing problem" (Expand search), "decoder codec string packing problem" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ 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 string packing problem") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder string packing problem\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder string packing problem ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder string packing problem") OR ("in python python python programming"))*.