Perhaps you should try some spelling variations:
"coder coder rigorous linear programming" » "coder coder rigorous lower programming" (Expand search), "coder coder rigorous inexact programming" (Expand search), "coder model rigorous linear programming" (Expand search), "coder more rigorous linear programming" (Expand search), "coder decoder rigorous linear programming" (Expand search), "code code rigorous linear programming" (Expand search), "decoder codec rigorous linear programming" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api 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 coder rigorous linear programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder rigorous linear programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder rigorous linear programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder rigorous linear programming") OR ("api python python python programming"))*.