Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"danh cau de snippets" » "danh dau de snippets", "danh ca de snippets", "danh hau de snippets", "danh cau den snippets", "danh cau do snippets", "danh cuu de 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: (((("danh cau de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh cau de snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh cau de snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh cau de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.