Perhaps you should try some spelling variations:
"hanh trinh ky snippets" » "canh tranh ky snippets", "hanh chinh ky snippets", "hanh trinh ky 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: (((("hanh trinh ky snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh trinh ky snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("hanh trinh ky snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.