Perhaps you should try some spelling variations:
"locating bung code snippets" » "locating bug code snippets", "locating bung code slippers"
"dung toan minh snippets" » "dung doanh minh snippets", "dung thang minh snippets", "dung thanh minh snippets", "dung tran minh snippets", "dung toan kinh snippets", "dung tuan minh snippets", "dung toan minh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"

Try widening your search to All Fields.

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