Perhaps you should try some spelling variations:
"dung lue zhang snippets" » "dung lele zhang snippets", "dung le thang snippets", "dung he zhang snippets", "dung le zhang snippets", "dung luan zhang snippets", "dung luat zhang snippets", "dung lue zhang slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 lue zhang snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung lue zhang snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung lue zhang snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung lue zhang snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.