Perhaps you should try some spelling variations:
"dung cong java snippets" » "dung trong java snippets", "dung cong va snippets"
"dung nhat co snippets" » "dung nhan co snippets", "dang nhat co snippets", "dung nha co snippets", "dung nhat cho snippets", "dung nhat so snippets", "dung chat co 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 cong java snippets") or ("dung nhat co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cong java snippets") OR ("dung nhat co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cong java snippets ) or ( dung nhat co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cong java snippets") or ("dung nhat co snippets"))) or ("locating bug code snippets"))*.