Perhaps you should try some spelling variations:
"advanced computation using reference array" » "advanced computations using reference array" (Expand search), "advanced computational using reference array" (Expand search), "advance computational using reference array" (Expand search), "advanced computation in reference array" (Expand search), "advanced composition using reference array" (Expand search), "advanced computation using reference area" (Expand search), "advanced computation using reference areas" (Expand search), "advanced computation using reference cardiac" (Expand search)
"using in python python programming" » "using in pythons python programming" (Expand search), "using in piton python programming" (Expand search), "using in pitons python programming" (Expand search), "using _ python 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: "((\"advanced computation using reference array\") OR (\"using in python python programming\"))~".
• Removing quotes may allow a broader search: (( advanced computation using reference array ) OR ( using in python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("advanced computation using reference array") OR ("using in python python programming"))*.