Perhaps you should try some spelling variations:
"tran dung code snippets" » "tran dang code snippets", "tran hung code snippets", "tran quang code snippets", "tran dung cong snippets", "tran dung de snippets", "tran dung con snippets", "tran dung chode snippets", "tran dung congde snippets", "tran dung cuade snippets", "tran dung code slippers"
"dung co code snippets" » "dung cho code snippets", "dung cong code snippets", "dung cua code snippets", "dung cfd code snippets", "dung co code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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