Perhaps you should try some spelling variations:
"using copulas using diffuse array" » "using formulas using diffuse array" (Expand search), "using copulas vine diffuse array" (Expand search), "using copulas in diffuse array" (Expand search), "using copulas using diffusion array" (Expand search), "using copulas using diffuse rural" (Expand search), "using copulas using diffuse moral" (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: (("using copulas using diffuse array") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using copulas using diffuse array\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( using copulas using diffuse array ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using copulas using diffuse array") OR ("using coding python python programming"))*.