Perhaps you should try some spelling variations:
"quang tran nhan snippets" » "quang tuan nhan snippets", "quang trung nhan snippets", "quang thanh nhan snippets", "quang tran nhat snippets", "quang tan nhan snippets", "quang tran han snippets", "quang tran nhan 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: (((("quang tran nhan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang tran nhan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang tran nhan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang tran nhan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.