Perhaps you should try some spelling variations:
"dung tuan do snippets" » "duong tuan do snippets", "dung luan do snippets", "dung quan do snippets", "dung toan do snippets", "dung truan doi snippets", "dung quan doi snippets"
"dung ung java snippets" » "dung trung java snippets", "dung quang java snippets", "dung chung java snippets", "dung using java snippets", "dung ngu java snippets", "dung ung va 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: (((("dung ung java snippets") or ("dung tuan do snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ung java snippets") OR ("dung tuan do snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung ung java snippets ) or ( dung tuan do snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung ung java snippets") or ("dung tuan do snippets"))) or ("locating bug code snippets"))*.