Perhaps you should try some spelling variations:
"coder coder precoder design effect" » "coder coder precoding design effect" (Expand search), "coder coder decoder design effect" (Expand search), "coder decoder precoder design effect" (Expand search), "code code precoder design effect" (Expand search), "decoder codec precoder design effect" (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 precoder design effect") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder precoder design effect\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder precoder design effect ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder precoder design effect") OR ("_ python python python programming"))*.