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