Perhaps you should try some spelling variations:
"dung zhuo chen snippets" » "dung thuoc chen snippets", "dung cho chen snippets", "dung phu chen snippets", "dung zhiguo chen snippets", "dung hui chen snippets", "dung zhuo han 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 zhuo 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 zhuo chen snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung zhuo chen snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung zhuo chen snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.