Perhaps you should try some spelling variations:
"and computation using sio2 array" » "and computations using sio2 array" (Expand search), "and computation in sio2 array" (Expand search), "and composition using sio2 array" (Expand search), "and computational using sio2 array" (Expand search), "of computation using sio2 array" (Expand search), "and computation using tio2 array" (Expand search), "and computation using six array" (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: "((\"and computation using sio2 array\") OR (\"using in python python programming\"))~".
• Removing quotes may allow a broader search: (( and computation using sio2 array ) OR ( using in python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computation using sio2 array") OR ("using in python python programming"))*.