Perhaps you should try some spelling variations:
"coder _ complexity linear program" » "coder _ complex linear program" (Expand search), "coder _ complexos linear program" (Expand search), "coder _ complexidade linear program" (Expand search), "coder _ complexity linear programmin" (Expand search), "coder _ complexity linear programming" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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 _ complexity linear program") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder _ complexity linear program\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder _ complexity linear program ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder _ complexity linear program") OR ("using coding python python programming"))*.