Perhaps you should try some spelling variations:
"and computational using computer program" » "and computation using computer program" (Expand search), "and computations using computer program" (Expand search), "and computacional usinas computer program" (Expand search), "_ computational using computer program" (Expand search)
"using code _ python programming" » "using cone _ python programming" (Expand search), "using co _ python programming" (Expand search), "using co2 _ 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: "((\"and computational using computer program\") OR (\"using code _ python programming\"))~".
• Removing quotes may allow a broader search: (( and computational using computer program ) OR ( using code _ python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computational using computer program") OR ("using code _ python programming"))*.