Perhaps you should try some spelling variations:
"advanced computational using computer program" » "and computational using computer program" (Expand search), "based computational using computer program" (Expand search), "advanced computation using computer program" (Expand search), "advanced computations using computer program" (Expand search), "advanced computacional usinas computer program" (Expand search)
"using codigo geant4 python programming" » "using codigo gate python programming" (Expand search), "using indigo geant4 python programming" (Expand search), "using coding geant4 python programming" (Expand search), "using codium geant4 python programming" (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 computational using computer program") OR ("using codigo geant4 python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced computational using computer program\") OR (\"using codigo geant4 python programming\"))".
• Removing quotes may allow a broader search: (( advanced computational using computer program ) OR ( using codigo geant4 python programming )).
• Adding a wildcard symbol may retrieve word variants: (("advanced computational using computer program") OR ("using codigo geant4 python programming"))*.