Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"mau cua cham snippets" » "mau cua cha snippets", "mau qua cham snippets", "mau ca cham snippets", "ma cua cham snippets", "mat cua cham snippets", "cau cua cham 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 ("mau cua cham snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("mau cua cham snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( mau cua cham snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("mau cua cham snippets"))) or ("locating bug code snippets"))*.