Perhaps you should try some spelling variations:
"dung ngu java snippets" » "dung nga java snippets", "dung ngo java snippets", "dung nguoi java snippets", "dung ngu va snippets"
"dan dung de snippets" » "van dung de snippets", "tin dung de snippets", "ap dung de snippets", "dan dung he snippets", "dan dung dat 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: (((("dung ngu java snippets") or ("dan dung de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ngu java snippets") OR ("dan dung de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung ngu java snippets ) or ( dan dung de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung ngu java snippets") or ("dan dung de snippets"))) or ("locating bug code snippets"))*.