Perhaps you should try some spelling variations:
"coder _ vector precoder program" » "coder _ vector proder program" (Expand search), "coder _ vector recovery program" (Expand search), "coder _ vector 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 _ vector precoder program") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder _ vector precoder program\") OR (\"on python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder _ vector precoder program ) OR ( on python python python programming ))*.