Perhaps you should try some spelling variations:
"trinh toan code snippets" » "tinh toan code snippets", "thanh toan code snippets", "trinh han code snippets", "trinh toan co snippets", "trinh toan cong snippets", "trinh toan de snippets", "trinh toan code slippers"
"dung nhung dat snippets" » "dung chung dat snippets", "dung nhan dat snippets", "dung trung dat snippets", "dung nhung hat snippets", "dung nhung phat snippets", "dung nhung danh snippets", "dung nhung 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 toan code snippets") or ("dung nhung dat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh toan code snippets") OR ("dung nhung dat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh toan code snippets ) or ( dung nhung dat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh toan code snippets") or ("dung nhung dat snippets"))) or ("locating bug code snippets"))*.