Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong cua chao snippets" » "dung cua chao snippets", "cong cua chao snippets", "huong cua chao snippets", "dong cua cha snippets", "dong chua chay snippets", "dong cua chuoi 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 ("dong cua chao snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong cua chao snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong cua chao snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong cua chao snippets"))) or ("locating bug code snippets"))*.