Perhaps you should try some spelling variations:
"dang dung code snippets" » "dan dung code snippets", "dang hung code snippets", "dang quang code snippets", "dang dung cong snippets", "dang dung co snippets", "dang dung de snippets", "dang dung code slippers"
"cong cac code snippets" » "cuong cac code snippets", "cong tac code snippets", "cong cau code snippets", "cong cac cong snippets", "cong cac co snippets", "cong cac che snippets", "cong cac code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("dang dung code snippets") or ("cong cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang dung code snippets") OR ("cong cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang dung code snippets ) or ( cong cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang dung code snippets") or ("cong cac code snippets"))) or ("locating bug code snippets"))*.