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