Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dan hieu cac snippets" » "danh hieu cac snippets", "van hieu cac snippets", "dao hieu cac snippets", "dan hieu luc snippets", "dan hieu va snippets", "dan hieu van 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: (((("dan hieu cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan hieu cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan hieu cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hieu cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.