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