Perhaps you should try some spelling variations:
"dung len chen snippets" » "dung len code snippets", "dung nen chen snippets", "dung le chen snippets", "dung luan chen snippets", "dung ben chen snippets", "dung ren chen snippets", "dung chen chen snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

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 len chen snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung len chen snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung len chen snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung len chen snippets"))) or ("locating bug core snippets"))*.