Perhaps you should try some spelling variations:
"trinh luan code snippets" » "trinh luat code snippets", "trinh quan code snippets", "trinh han code snippets", "trinh luan cong snippets", "trinh luan che snippets", "trinh luan de snippets", "trinh luan code slippers"
"dung huong dat snippets" » "dung thuong dat snippets", "dung phuong dat snippets", "dong huong dat snippets", "dung huong dan snippets", "dung thuong dam snippets", "dung huong phat snippets", "dung huong dat slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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

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