Perhaps you should try some spelling variations:
"coder decoder encoding linear programming" » "coder degree encoding linear programming" (Expand search), "coder core encoding linear programming" (Expand search), "coder decoder encode linear programming" (Expand search), "coder decoder canceling linear programming" (Expand search), "coder decoder employing linear programming" (Expand search), "encoder decoder encoding linear programming" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 encoding linear programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder encoding linear programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder encoding linear programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder encoding linear programming") OR ("_ python python python programming"))*.