Perhaps you should try some spelling variations:
"coder decoder coding variants changed" » "coder decoder coding variants challenges" (Expand search), "coder decoder coding variants challenge" (Expand search), "coder decoder coding variants and" (Expand search), "coder decoder coding variation changed" (Expand search), "coder decoder codecs variants changed" (Expand search), "coder decoder using variants changed" (Expand search), "coder decoder codec variants changed" (Expand search), "encoder decoder coding variants changed" (Expand search)
"api pythons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons piton python programming" (Expand search), "api pythons pitons python programming" (Expand search), "api pythons pytm python programming" (Expand search), "api python python 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 coding variants changed") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder coding variants changed\") OR (\"api pythons python python programming\"))*".
• Removing quotes may allow a broader search: (( coder decoder coding variants changed ) OR ( api pythons python python programming ))*.