Perhaps you should try some spelling variations:
"dung jun zhang snippets" » "dung juan zhang snippets", "dung jing zhang snippets", "dung yuan zhang snippets", "dung luan zhang snippets", "dung quan zhang snippets", "dung dung zhang snippets", "dung jun 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 jun 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 jun zhang snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung jun zhang snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung jun zhang snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.