Perhaps you should try some spelling variations:
"dung nhan code snippets" » "dung luan code snippets", "dung nhan co snippets", "dung nhan con snippets", "dung nhan code slippers"
"tran duy code snippets" » "tran duc code snippets", "tran quy code snippets", "tran thuy code snippets", "tran duy de snippets", "tran duy 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.

You may be able to get more results by adjusting your search query.

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