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