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