Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"xuan duc con snippets" » "tran duc con snippets", "phan duc con snippets", "xuan huy con snippets", "xuan duc cong snippets", "xuan duc ton snippets", "xuan duc cuong 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: (((("xuan duc con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan duc con snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan duc con snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan duc con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.