Perhaps you should try some spelling variations:
"using perturbations from python programming" » "using perturbation from python programming" (Expand search), "sink perturbation from python programming" (Expand search), "under perturbations from python programming" (Expand search), "using perturbations of python programming" (Expand search), "using perturbations on python programming" (Expand search), "using perturbations from pathogen programming" (Expand search), "using perturbations from anthony programming" (Expand search)
"based computational in computing program" » "and computational in computing program" (Expand search), "by computational in computing program" (Expand search), "based computational in consulting program" (Expand search), "based computational in computer program" (Expand search), "based computational in computador program" (Expand search), "based computational and computing program" (Expand search), "based computational _ computing program" (Expand search), "based computational 3d computing program" (Expand search), "based computational of computing 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: (("based computational in computing program") OR ("using perturbations from python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computational in computing program\") OR (\"using perturbations from python programming\"))".
• Removing quotes may allow a broader search: (( based computational in computing program ) OR ( using perturbations from python programming )).
• Adding a wildcard symbol may retrieve word variants: (("based computational in computing program") OR ("using perturbations from python programming"))*.