Perhaps you should try some spelling variations:
"dung dung cua snippets" » "duong dung cua snippets", "ung dung cua snippets", "dung ung cua snippets", "dung dung luan snippets", "dung dung cho snippets"
"dung dbbugs code snippets" » "dung dbbugs core snippets", "dung dbbungs code snippets", "dung dbbugss code snippets"
"locating bug code snippets" » "locating bug core 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: (((("dung dung cua snippets") or ("dung dbbugs code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung cua snippets") OR ("dung dbbugs code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dung cua snippets ) or ( dung dbbugs code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dung cua snippets") or ("dung dbbugs code snippets"))) or ("locating bug code snippets"))*.