Perhaps you should try some spelling variations:
"trong quan anh snippets" » "thong quan anh snippets", "tong quan anh snippets", "thong quang anh snippets", "trong quan hanh snippets", "trong quang anh snippets", "trong tuan anh snippets", "trong quan anh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trong quan anh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong quan anh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trong quan anh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.