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