Perhaps you should try some spelling variations:
"dung cacfd code snippets" » "dung cac code snippets", "dung cfd code snippets", "dung cacfd code slippers"
"luan hoan code snippets" » "luan van code snippets", "luan hoan code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("luan hoan code snippets") or ("dung cacfd code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan hoan code snippets") OR ("dung cacfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan hoan code snippets ) or ( dung cacfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan hoan code snippets") or ("dung cacfd code snippets"))) or ("locating bug code snippets"))*.