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