Perhaps you should try some spelling variations:
"trung dung dong snippets" » "ung dung dong snippets", "trung uong dong snippets", "trinh dung dong snippets", "trung dung cong snippets", "trung vung dong snippets", "trung dung trong snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dung java java snippets") or ("trung dung dong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trung dung dong snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trung dung dong snippets"))) or ("locating bug code snippets"))*.