Perhaps you should try some spelling variations:
"cong dung cong snippets" » "cuong dung cong snippets", "cong dong cong snippets", "cong luong cong snippets", "cong dung trong snippets"
"dung dbugs code snippets" » "dung dbungs code snippets", "dung dbugss code snippets"
"locating bug code snippets" » "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: (((("cong dung cong snippets") or ("dung dbugs code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dung cong snippets") OR ("dung dbugs code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dung cong snippets ) or ( dung dbugs code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dung cong snippets") or ("dung dbugs code snippets"))) or ("locating bug code snippets"))*.