Perhaps you should try some spelling variations:
"dung che duoc snippets" » "dung chet duoc snippets", "duong che duoc snippets", "dung cho duoc snippets", "dung che thuoc snippets", "dung che do snippets", "dung te duoc snippets", "dung che duoc slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung che duoc snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung che duoc snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung che duoc snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung che duoc snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.