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