Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"dung viet code slippers" » "nang viet code slippers", "cong viet code slippers", "mang viet code slippers", "dung viet co slippers", "dung viet some slippers"
"tran van code snippets" » "luan van code snippets", "tran van de snippets", "tran van hoe snippets", "tran van cong snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran van code snippets") OR ("dung viet code slippers"))) OR ("locating bugs code snippets"))~.
• Removing quotes may allow a broader search: (((( tran van code snippets ) or ( dung viet code slippers ))) or ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("tran van code snippets") or ("dung viet code slippers"))) or ("locating bugs code snippets"))*.