Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"hoc sach code slippers" » "hoc sach che slippers", "hoc sach de slippers", "hoc sinh code slippers", "hoc cac code slippers", "hoc anh code slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("hoc sach code slippers"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( hoc sach code slippers ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("hoc sach code slippers"))) or ("locating bug code snippets"))*.