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