Perhaps you should try some spelling variations:
"using computational in computer program" » "and computational in computer program" (Expand search), "using computational and computer program" (Expand search), "using computational _ computer program" (Expand search), "using computational 3d computer program" (Expand search)
"using imputation code coding program" » "using mutation code coding program" (Expand search), "testing imputation code coding program" (Expand search), "using indentation code coding program" (Expand search), "using imputation model coding program" (Expand search), "using imputation some coding program" (Expand search), "using imputation models coding program" (Expand search), "using imputation code cloning program" (Expand search), "using imputation code loading program" (Expand search), "using imputation code cooling programs" (Expand search), "using imputation code codigo program" (Expand search), "using imputation code according program" (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 imputation code coding program") OR ("using computational in computer program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using imputation code coding program\") OR (\"using computational in computer program\"))".
• Removing quotes may allow a broader search: (( using imputation code coding program ) OR ( using computational in computer program )).
• Adding a wildcard symbol may retrieve word variants: (("using imputation code coding program") OR ("using computational in computer program"))*.