Perhaps you should try some spelling variations:
"coder ldpc decoding algorithm problem" » "coder ldpc learning algorithm problem" (Expand search), "coder ldpc testing algorithm problem" (Expand search), "coder ldpc decision algorithm problem" (Expand search), "coder ldpc decoding algorithms problem" (Expand search), "coder ldpc decoding algoritmo problema" (Expand search), "coder ldpc decoding logarithm problem" (Expand search), "coder ldpc decoders algorithm problem" (Expand search), "coder list decoding algorithm problem" (Expand search), "codes ldpc decoding algorithm problem" (Expand search), "core ldpc decoding algorithm 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 ldpc decoding algorithm problem\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder ldpc decoding algorithm problem ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder ldpc decoding algorithm problem") OR ("_ python python python programming"))*.