Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"trinh anh tuan snippets" » "trinh hanh tuan snippets", "trinh thanh tuan snippets", "trinh kinh tuan snippets", "trinh anh tuan slippers", "trinh anh quan snippets", "trinh anh tran snippets", "trinh anh luan snippets"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung va java snippets") or ("trinh anh tuan snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("trinh anh tuan snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( trinh anh tuan snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("trinh anh tuan snippets"))) or ("locating bugs code snippets"))*.