Perhaps you should try some spelling variations:
"using computational code using program" » "and computational code using program" (Expand search), "using computational model using program" (Expand search), "using computational cost using program" (Expand search), "using computational models using program" (Expand search), "using computational code housing program" (Expand search), "using computational code nursing program" (Expand search), "using computational code aging program" (Expand search), "using computational made using program" (Expand search), "using computational coding using program" (Expand search)
"using population _ coding program" » "aging population _ coding program" (Expand search), "ageing population _ coding program" (Expand search), "young population _ coding program" (Expand search), "using population _ cloning program" (Expand search), "using population _ loading program" (Expand search), "using population _ cooling programs" (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 code using program") OR ("using population _ coding program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational code using program\") OR (\"using population _ coding program\"))".
• Removing quotes may allow a broader search: (( using computational code using program ) OR ( using population _ coding program )).
• Adding a wildcard symbol may retrieve word variants: (("using computational code using program") OR ("using population _ coding program"))*.