Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van duc cac snippets" » "van duy cac snippets", "van du cac snippets", "tran duc cac snippets", "van duoc cac snippets", "van tuc cac snippets", "van muc 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: (((("van duc 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: (((("van duc cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van duc cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van duc cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.