Perhaps you should try some spelling variations:
"coder coder strings linear programming" » "coder coder series linear programming" (Expand search), "coder coder during linear programming" (Expand search), "coder coder varing linear programming" (Expand search), "coder model strings linear programming" (Expand search), "coder encoded strings linear programming" (Expand search), "coder closed strings linear programming" (Expand search), "coder decoder strings linear programming" (Expand search), "code code strings linear programming" (Expand search), "decoder codec strings linear programming" (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 coder strings linear programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder strings linear programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder strings linear programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder strings linear programming") OR ("on python python python programming"))*.