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