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