Perhaps you should try some spelling variations:
"using computational using subsampling program" » "and computational using subsampling program" (Expand search), "using computation using subsampling program" (Expand search), "using computations using subsampling program" (Expand search), "using computacional usinas subsampling program" (Expand search), "using computational using sampling program" (Expand search), "using computational and subsampling program" (Expand search)
"using code form python programming" » "using cone form python programming" (Expand search), "using co form python programming" (Expand search), "using co2 form 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 computational using subsampling program") OR ("using code form python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational using subsampling program\") OR (\"using code form python programming\"))".
• Removing quotes may allow a broader search: (( using computational using subsampling program ) OR ( using code form python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using computational using subsampling program") OR ("using code form python programming"))*.