Perhaps you should try some spelling variations:
"coder tested the precoder program" » "coder tested the proder program" (Expand search), "coder tested the recovery program" (Expand search), "coder tested the precoce programa" (Expand search), "model tested the precoder program" (Expand search), "models tested the precoder program" (Expand search), "coder tested to precoder program" (Expand search), "coder tested the precede program" (Expand search), "coder tested the precore program" (Expand search), "coder teste the precoder program" (Expand search), "coder treated the precoder program" (Expand search), "coder twisted the 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 tested the precoder program") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder tested the precoder program\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder tested the precoder program ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder tested the precoder program") OR ("on python python python programming"))*.