Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"ban giua cac snippets" » "ban giu cac snippets", "ban giup cac snippets", "quan giua cac snippets", "ban giua cau snippets", "ban cua cac snippets", "ban gian cac 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: (((("ban giua 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: (((("ban giua cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban giua cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban giua cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.