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