Perhaps you should try some spelling variations:
"coder coder channel selection problem" » "coder coder channel allocation problem" (Expand search), "coder coder channel selection process" (Expand search), "coder coder channel location problem" (Expand search), "coder codes channel selection problem" (Expand search), "coder adder channel selection problem" (Expand search), "coder color channel selection problem" (Expand search), "coder decoder channel selection problem" (Expand search), "code code channel selection problem" (Expand search), "decoder codec channel selection problem" (Expand search)
"via python python python programming" » "via pythons python python programming" (Expand search), "via piton python python programming" (Expand search), "via pitons python python programming" (Expand search), "in python 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 channel selection problem\") OR (\"via python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder channel selection problem ) OR ( via python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder channel selection problem") OR ("via python python python programming"))*.