Perhaps you should try some spelling variations:
"dung quang tran snippets" » "dung quang tuan snippets", "dung quang trung snippets", "dung quang thanh snippets", "dang quang tran snippets", "luong quang tran snippets", "dung luan tran snippets", "dung quang tran slippers"
"using a code snippets" » "using a core snippets", "using a code slippers"
"locating bug code snippets" » "locating bug core 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: (((("using a code snippets") or ("dung quang tran snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("dung quang tran snippets"))) OR ("locating bug code snippets")).
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