Perhaps you should try some spelling variations:
"using computational code using problems" » "and computational code using problems" (Expand search), "using computational model using problems" (Expand search), "using computational cost using problems" (Expand search), "using computational models using problems" (Expand search), "using imputational code using problems" (Expand search), "using compilational code using problems" (Expand search), "using coaptational code using problems" (Expand search), "using computational code using problem" (Expand search), "using computational code housing problems" (Expand search), "using computational code ising problem" (Expand search), "using computational made using problems" (Expand search), "using computational coding using problems" (Expand search)
"using computation and coding program" » "using imputation and coding program" (Expand search), "using compilation and coding program" (Expand search), "using coaptation and coding program" (Expand search), "using computational and coding program" (Expand search), "using computation of coding program" (Expand search), "using computation and cloning program" (Expand search), "using computation and loading program" (Expand search), "using computation and cooling programs" (Expand search), "using computation and coping program" (Expand search), "using computation and cooling program" (Expand search), "using computation and cooking program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational code using problems\") OR (\"using computation and coding program\"))~".
• Removing quotes may allow a broader search: (( using computational code using problems ) OR ( using computation and coding program ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational code using problems") OR ("using computation and coding program"))*.