Perhaps you should try some spelling variations:
"coder coder compact frequency problem" » "coder coder dominant frequency problem" (Expand search), "coder coder constant frequency problem" (Expand search), "coder coder space frequency problem" (Expand search), "coder coder compact frequency probe" (Expand search), "coder coder compact frequent problem" (Expand search), "coder coder compact frequency profiled" (Expand search), "coder powder compact frequency problem" (Expand search), "coder under compact frequency problem" (Expand search), "coder model compact frequency problem" (Expand search), "coder decoder compact frequency problem" (Expand search), "code code compact frequency problem" (Expand search), "decoder codec compact frequency 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 compact frequency problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder compact frequency problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder compact frequency problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder compact frequency problem") OR ("_ python python python programming"))*.