Perhaps you should try some spelling variations:
"advanced imputation in computer program" » "advanced computations in computer program" (Expand search), "advanced simulation in computer program" (Expand search), "advanced computational in computer program" (Expand search), "advanced mutation in computer program" (Expand search), "advanced imputation of computer program" (Expand search), "advanced implantation in computer program" (Expand search), "advanced imputation _ computer program" (Expand search)
"based computational and computational program" » "by computational and computational program" (Expand search), "based computational fluid computational program" (Expand search), "based computational _ computational 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: (("advanced imputation in computer program") OR ("based computational and computational program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced imputation in computer program\") OR (\"based computational and computational program\"))".
• Removing quotes may allow a broader search: (( advanced imputation in computer program ) OR ( based computational and computational program )).
• Adding a wildcard symbol may retrieve word variants: (("advanced imputation in computer program") OR ("based computational and computational program"))*.