Perhaps you should try some spelling variations:
"dung dung toan snippets" » "dung dung code snippets", "duong dung toan snippets", "ung dung toan snippets", "dung ung toan snippets", "dung dung doanh snippets", "dung dung thang snippets", "dung dung thanh 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 dung toan 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 dung toan snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung dung toan snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
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