Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tung dan den snippets" » "dung dan den snippets", "huong dan den snippets", "trung dai den snippets", "tung ban den snippets", "tung van den snippets", "tung dan dung 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: (((("tung dan 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: (((("tung dan den snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tung dan den snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tung dan den snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.