Perhaps you should try some spelling variations:
"coder coder concepts allocation problem" » "coder coder concepts application problem" (Expand search), "coder coder concepts aplications problem" (Expand search), "coder coder concept location problem" (Expand search), "coder coder concepts location problem" (Expand search), "coder modern concepts allocation problem" (Expand search), "coder core concepts allocation problem" (Expand search), "coder code concept allocation problem" (Expand search), "coder decoder concepts allocation problem" (Expand search), "code code concepts allocation problem" (Expand search), "decoder codec concepts allocation 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 concepts allocation problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder concepts allocation problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder concepts allocation problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder concepts allocation problem") OR ("_ python python python programming"))*.