Perhaps you should try some spelling variations:
"based computational grids computer program" » "and computational grids computer program" (Expand search), "by computational grids computer program" (Expand search), "based computational and computer program" (Expand search), "based computational design computer program" (Expand search)
"using models from python programming" » "ising models from python programming" (Expand search), "using model from python programming" (Expand search), "nursing models from python programming" (Expand search), "using models from pathogen programming" (Expand search), "using models from anthony 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 grids computer program\") OR (\"using models from python programming\"))~".
• Removing quotes may allow a broader search: (( based computational grids computer program ) OR ( using models from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based computational grids computer program") OR ("using models from python programming"))*.