Perhaps you should try some spelling variations:
"coder precoder shape linear programming" » "coder decoder shape linear programming" (Expand search), "coder precoder scheme linear programming" (Expand search), "coder precoder hp linear programming" (Expand search), "coder precoder slope linear programming" (Expand search), "coder precoder type linear programming" (Expand search), "coder precoder shape fiber 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 precoder shape linear programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder shape linear programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder shape linear programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder shape linear programming") OR ("_ python python python programming"))*.