Perhaps you should try some spelling variations:
"dung dat tranh snippets" » "dung dat thanh snippets", "dung dau tranh snippets", "dung dat khanh snippets", "dung va tranh snippets", "dung tai tranh snippets", "dung dat tranh slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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