Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"xuan nam de snippets" » "quang nam de snippets", "xuan nang de snippets", "xuan nhan de snippets", "xuan nam da snippets", "xuan nam do snippets", "xuan nam he 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 nam de 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 nam de snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan nam de snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan nam de snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.