Perhaps you should try some spelling variations:
"dung yong zheng snippets" » "dung yong zhang snippets", "dung yang zhang snippets", "dung ying zhang snippets", "dung cong zheng snippets", "dung dong zheng snippets", "dung hong zheng snippets", "dung yong zheng 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 java java snippets") or ("dung yong zheng snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung yong zheng snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung yong zheng snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung yong zheng snippets"))) or ("locating bug code snippets"))*.