Perhaps you should try some spelling variations:
"dung vieaon code snippets" » "dung vien code snippets", "dung vaeaon code snippets", "dung vieteaon code snippets", "dung taieaon code snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung vi code snippets" » "dung va code snippets", "dung viet code snippets", "dung tai code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung vi code snippets") or ("dung vieaon code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vi code snippets") OR ("dung vieaon code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung vi code snippets ) or ( dung vieaon code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vi code snippets") or ("dung vieaon code snippets"))) or ("locating bug core snippets"))*.