Perhaps you should try some spelling variations:
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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using pollution teaching java programming\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using pollution teaching java programming ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using pollution teaching java programming") OR ("using coding python python programming"))*.