Perhaps you should try some spelling variations:
"duong benh dot snippets" » "duong binh dot snippets", "giuong benh dot snippets", "duong manh dot snippets", "duong benh hoc snippets", "duong benh noi snippets", "duong benh dai snippets"
"dung java java snippets" » "dung va java 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: (((("duong benh dot snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong benh dot snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong benh dot snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong benh dot snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.