Perhaps you should try some spelling variations:
"based computational _ computing program" » "and computational _ computing program" (Expand search), "by computational _ computing program" (Expand search), "based computational _ consulting program" (Expand search), "based computational _ computer program" (Expand search), "based computational _ computador 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computational _ computing program\") OR (\"using codigo geant4 python programming\"))~".
• Removing quotes may allow a broader search: (( based computational _ computing program ) OR ( using codigo geant4 python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computational _ computing program") OR ("using codigo geant4 python programming"))*.