Perhaps you should try some spelling variations:
"using computational in sio2 array" » "and computational in sio2 array" (Expand search), "using computational and sio2 array" (Expand search), "using computational _ sio2 array" (Expand search), "using computational 3d sio2 array" (Expand search), "using computational on sio2 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: "((\"using computational in sio2 array\") OR (\"using in python python programming\"))~".
• Removing quotes may allow a broader search: (( using computational in sio2 array ) OR ( using in python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational in sio2 array") OR ("using in python python programming"))*.