Perhaps you should try some spelling variations:
"data compression using linear programming" » "data compression in linear programming" (Expand search), "data expression using linear programming" (Expand search), "data compression molding linear programming" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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: (("data compression using linear programming") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"data compression using linear programming\") OR (\"using codigo python python programming\"))".
• Removing quotes may allow a broader search: (( data compression using linear programming ) OR ( using codigo python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("data compression using linear programming") OR ("using codigo python python programming"))*.