Perhaps you should try some spelling variations:
"dung cong phan snippets" » "dung trong phan snippets", "dung cong nhan snippets", "dung cong khan snippets", "dung chong phap snippets", "dung cong phan slippers"
"trinh tu code snippets" » "trinh ky code snippets", "trinh do code snippets", "trinh tu 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: (((("dung cong phan snippets") or ("trinh tu code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cong phan snippets") OR ("trinh tu code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cong phan snippets ) or ( trinh tu code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cong phan snippets") or ("trinh tu code snippets"))) or ("locating bug code snippets"))*.