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