Perhaps you should try some spelling variations:
"trinh dan code snippets" » "trinh han code snippets", "trinh van code snippets", "trinh san code snippets", "trinh dan de snippets"
"dung hung code snippets" » "dung chung code snippets", "dung nhung code snippets", "dung huong code snippets", "dung bug code snippets"
"locating bug core snippets" » "locating bug code 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: (((("trinh dan code snippets") OR ("dung hung code snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( trinh dan code snippets ) or ( dung hung code snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh dan code snippets") or ("dung hung code snippets"))) or ("locating bug core snippets"))*.