Perhaps you should try some spelling variations:
"tran hung dat snippets" » "tran hong dat snippets", "tran quang dat snippets", "tran hoang dat snippets", "tran dung dat snippets", "tran vung dat snippets", "tran hung dao snippets", "tran hung dat 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: (((("tran hung dat snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hung dat snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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