Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tran danh cac snippets" » "tran dinh cac snippets", "tran manh cac snippets", "tran dang cac snippets", "tran danh ca snippets", "tran hanh cac snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 ("tran danh cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("tran danh cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( tran danh cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("tran danh cac snippets"))) or ("locating bug code snippets"))*.