Perhaps you should try some spelling variations:
"dung chat long snippets" » "dung chat code snippets", "dung nhat long snippets", "luong chat long snippets", "dung cho long snippets", "dung chat luong snippets", "dung hai long snippets", "dung ha long snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung chat long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chat long snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
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