Perhaps you should try some spelling variations:
"dung phan code snippets" » "dung nhan code snippets", "dung luan code snippets", "dung ha code snippets", "dung phan cong snippets", "dung phan co snippets", "dung phan che snippets", "dung phan code slippers"
"pham moi code snippets" » "pham mo code snippets", "pham doi code snippets", "pham voi code snippets", "pham moi co snippets", "pham moi cong snippets", "pham moi con snippets", "pham moi 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: (((("pham moi code snippets") or ("dung phan code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham moi code snippets") OR ("dung phan code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham moi code snippets ) or ( dung phan code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham moi code snippets") or ("dung phan code snippets"))) or ("locating bug code snippets"))*.