Perhaps you should try some spelling variations:
"advanced simulation and computational program" » "advanced modulation and computational program" (Expand search), "advanced calculation and computational program" (Expand search), "advanced simulation _ computational program" (Expand search)
"advanced imputation in computer program" » "advanced computations in computer program" (Expand search), "advanced computational in computer program" (Expand search), "advanced modulation 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)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("advanced simulation and computational program") OR ("advanced imputation in computer program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced simulation and computational program\") OR (\"advanced imputation in computer program\"))".
• Removing quotes may allow a broader search: (( advanced simulation and computational program ) OR ( advanced imputation in computer program )).
• Adding a wildcard symbol may retrieve word variants: (("advanced simulation and computational program") OR ("advanced imputation in computer program"))*.