Perhaps you should try some spelling variations:
"trinh lich phi snippets" » "trinh kinh phi snippets", "trinh linh phi snippets", "trinh lich thai snippets", "trinh tich pho snippets", "trinh lich phi 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 lich phi snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("trinh lich phi snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.