Perhaps you should try some spelling variations:
"dung danh phap snippets" » "dung doanh phap snippets", "dung dan phap snippets", "dung dang phap snippets", "dung dinh phap snippets", "dung ban phap snippets", "dung danh nhan snippets", "dung danh phap slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug core snippets", "dung bug code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers"

Try widening your search to All Fields.

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