Perhaps you should try some spelling variations:
"dung bing chen snippets" » "dung cong chen snippets", "dung ung chen snippets", "dung dong chen snippets", "dung ping chen snippets", "dung qing chen snippets", "dung liang chen 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 bing chen 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 bing chen snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung bing chen snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung bing chen snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.