Perhaps you should try some spelling variations:
"using computations using sampling program" » "using computational using sampling program" (Expand search), "using computacional using sampling program" (Expand search), "using imputation using sampling program" (Expand search), "using computation using sampling program" (Expand search), "using populations using sampling program" (Expand search), "using computations in sampling program" (Expand search), "using computations using labeling program" (Expand search), "using computations using smoking program" (Expand search), "using computations using jumping program" (Expand search), "using computations using subsampling program" (Expand search), "using computations using saline program" (Expand search), "using computations using samples program" (Expand search)
"using modes from python programming" » "using models from python programming" (Expand search), "using modis from python programming" (Expand search), "using model from python programming" (Expand search), "using modes from pathogen programming" (Expand search), "using modes from anthony programming" (Expand search), "using codes from python programming" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computations using sampling program\") OR (\"using modes from python programming\"))~".
• Removing quotes may allow a broader search: (( using computations using sampling program ) OR ( using modes from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computations using sampling program") OR ("using modes from python programming"))*.