Perhaps you should try some spelling variations:
"trinh dan vi snippets" » "trinh han vi snippets", "trinh van vi snippets", "trinh san vi snippets", "trinh doan vi snippets", "trinh don vi snippets", "trinh dan va snippets", "trinh dan vi 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: (((("trinh dan vi snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh dan vi snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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