Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong ly doi snippets" » "cong ty doi snippets", "cong li doi snippets", "cong my doi snippets", "cong ly dai snippets", "cong ky doi snippets", "cong ly do 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 ("cong ly doi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong ly doi snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong ly doi snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong ly doi snippets"))) or ("locating bug code snippets"))*.