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