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