Perhaps you should try some spelling variations:
"using computational sobre sio2 array" » "and computational sobre sio2 array" (Expand search), "using computacional sobre sio2 array" (Expand search), "using computational softwre sio2 array" (Expand search), "using computacionais sobre sio2 array" (Expand search), "using computational sobre tio2 array" (Expand search), "using computational sobre si array" (Expand search), "using computational sobre sao array" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("using computational sobre sio2 array") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational sobre sio2 array\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( using computational sobre sio2 array ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using computational sobre sio2 array") OR ("using coding python python programming"))*.