Perhaps you should try some spelling variations:
"based computational using computer program" » "and computational using computer program" (Expand search), "by computational using computer program" (Expand search), "based computation using computer program" (Expand search), "based computations using computer program" (Expand search), "based computacional usinas computer program" (Expand search)
"using mobile and python programming" » "using mobile app python programming" (Expand search), "using mobile in python programming" (Expand search), "using mobile on python programming" (Expand search), "using mobile api python programming" (Expand search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("based computational using computer program") OR ("using mobile and python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based computational using computer program\") OR (\"using mobile and python programming\"))".
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