Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung chat den snippets" » "dung chat code snippets", "dung nhat den snippets", "luong chat den snippets", "dung cho den snippets", "dung chat dien snippets", "dung chat deo snippets", "dung cham den 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 chat den snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chat den snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung chat den snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chat den snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.