Perhaps you should try some spelling variations:
"tung van trinh snippets" » "tung van thinh snippets", "tung van tinh snippets", "tung dan trinh snippets", "trung van trinh snippets", "tang van trinh snippets", "dung van trinh snippets", "tung van trinh 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: (((("tung van trinh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tung van trinh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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