Perhaps you should try some spelling variations:
"and computation using complex program" » "and computations using complex program" (Expand search), "and computation in complex program" (Expand search), "and composition using complex program" (Expand search), "and computational using complex program" (Expand search), "of computation using complex program" (Expand search), "and computation using simplex program" (Expand search), "and computation using complex programmes" (Expand search), "and computation using complex prograded" (Expand search), "and computation housing complex program" (Expand search), "and computation using computer program" (Expand search)
"using codes from python programming" » "using code from python programming" (Expand search), "using anodes from python programming" (Expand search), "using cone from python programming" (Expand search), "using codes from pathogen programming" (Expand search), "using codes from anthony programming" (Expand search), "using cestodes from 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 computation using complex program\") OR (\"using codes from python programming\"))~".
• Removing quotes may allow a broader search: (( and computation using complex program ) OR ( using codes from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computation using complex program") OR ("using codes from python programming"))*.