Perhaps you should try some spelling variations:
"and computation in computer program" » "and computational in computer program" (Expand search), "of computation in computer program" (Expand search), "and computation and computer program" (Expand search), "and computation of computer program" (Expand search), "and imputation in computer program" (Expand search), "and computation _ computer program" (Expand search)
"using mobile in python programming" » "using mobile and python programming" (Expand search), "using mobile _ python programming" (Expand search), "using mobile ad 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 in computer program\") OR (\"using mobile in python programming\"))~".
• Removing quotes may allow a broader search: (( and computation in computer program ) OR ( using mobile in python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computation in computer program") OR ("using mobile in python programming"))*.