Perhaps you should try some spelling variations:
"coder implementation _ precoder program" » "code implementation _ precoder program" (Expand search), "decoder implementation _ precoder program" (Expand search), "model implementation _ precoder program" (Expand search), "coder implementation _ proder program" (Expand search), "coder implementation _ recovery program" (Expand search), "coder implementation _ precoce programa" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 implementation _ precoder program") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder implementation _ precoder program\") OR (\"on python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder implementation _ precoder program ) OR ( on python python python programming ))*.