Perhaps you should try some spelling variations:
"by computations using computer program" » "by computation using computer program" (Expand search), "by populations using computer program" (Expand search), "by computations in computer program" (Expand search), "by computational using computer program" (Expand search), "of computations using computer program" (Expand search), "by computacional using computer program" (Expand search)
"using code from python programming" » "using code from pathogen programming" (Expand search), "using code from anthony programming" (Expand search), "using cone from python programming" (Expand search), "using co from python programming" (Expand search), "using co2 from python programming" (Expand search), "using code form 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: (("by computations using computer program") OR ("using code from python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"by computations using computer program\") OR (\"using code from python programming\"))".
• Removing quotes may allow a broader search: (( by computations using computer program ) OR ( using code from python programming )).
• Adding a wildcard symbol may retrieve word variants: (("by computations using computer program") OR ("using code from python programming"))*.