Perhaps you should try some spelling variations:
"nang viet code snippets" » "anh viet code snippets", "nang viet co snippets", "nang viet some snippets", "nang viet code slippers"
"dung von code snippets" » "dong von code snippets", "dung cong code snippets", "dung va code snippets", "dung von cong snippets", "dung von 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 von code snippets") or ("nang viet code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung von code snippets") OR ("nang viet code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung von code snippets ) or ( nang viet code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung von code snippets") or ("nang viet code snippets"))) or ("locating bug code snippets"))*.