Perhaps you should try some spelling variations:
"dang dung cong snippets" » "dan dung cong snippets", "dang hung cong snippets", "dang quang cong snippets", "dang dung trong snippets"
"using a code snippets" » "using a core snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs 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: (((("dang dung cong snippets") or ("using a code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang dung cong snippets") OR ("using a code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang dung cong snippets ) or ( using a code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang dung cong snippets") or ("using a code snippets"))) or ("locating bug code snippets"))*.