Perhaps you should try some spelling variations:
"quang tran tuan snippets" » "quang tuan tuan snippets", "quang trung tuan snippets", "quang thanh tuan snippets", "quang tran xuan snippets", "quang tran quang snippets", "quang tran thanh snippets", "quang tran tuan 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 tuan 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 tuan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang tran tuan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang tran tuan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.