Perhaps you should try some spelling variations:
"coder coder language complexity problem" » "coder coder language complex problem" (Expand search), "coder coder language completion problem" (Expand search), "coder coder language convexity problem" (Expand search), "coder code language complexity problem" (Expand search), "coder modern language complexity problem" (Expand search), "coder border language complexity problem" (Expand search), "coder decoder language complexity problem" (Expand search), "code code language complexity problem" (Expand search), "decoder codec language complexity 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder language complexity problem\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder language complexity problem ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder language complexity problem") OR ("_ python python python programming"))*.